First-person shooter
Introduction Half-Life''.A '''first-person shooter''' ('''FPS''') is a video game centered on gun fighting and other weapon-based combat seen from a first-person perspective, with the player experiencing the action directly through the eyes of the main character. This genre shares multiple common traits with other shooter games, and in turn falls under the action games category. Since the genre's inception, advanced 3D and pseudo-3D graphics have proven fundamental to allow a reasonable level of immersion in the game world, and this type of games helped pushing technology progressively further, challenging hardware developers worldwide to introduce numerous innovations in the field of graphics processing units.Multiplayer gaming has been an integral part of the experience, and became even more prominent with the diffusion of internet connectivity in recent years.The first-person shooter genre has been traced back to ''Wolfenstein 3D'' (1992) which has been credited with creating the basic archetype upon which subsequent titles were based. One such title, considered the progenitor of the genre's mainstream acceptance and popularity, was ''Doom'' (1993), often cited as the most influential game in this category; for years, the term "Doom clone" was used to designate this type of games, due to ''Doom''s enormous success. Another common name for the genre in its early days was "corridor shooter", since processing limitations of that era's computer hardware meant that most of the action had to take place in enclosed areas, such as corridors and small rooms.During the 1990s, the genre has been one of the main cornerstones for technological advancements of computer graphics, starting with the release of ''Quake'' in 1996. ''Quake'' was one of the first real-time 3D rendered video games in history, and quickly became one of the most acclaimed shooter games of all time. Graphics accelerator hardware became essential to improve performances and add new effects such as full texture mapping, dynamic lighting and particle processing to the 3D engines that powered the games of that period, such as the iconic id Tech 2, the first iteration of the Unreal engine, or the more versatile Build. Other seminal games were released during the years, with ''Marathon'' enhancing the narrative and puzzle elements, ''Duke Nukem 3D'' introducing voice acting, complete interactivity with the environment, and city-life settings to the genre, and games like ''Tom Clancy's Rainbow Six'' and ''Counter-Strike'' starting to adopt a realistic and tactical approach aimed at simulating real life counter-terrorism situations. ''GoldenEye 007'', released in 1997, was a landmark first-person shooter for home consoles, while the critical and commercial success of later titles like ''Perfect Dark'', ''Medal of Honor'' and the ''Halo'' series helped to heighten the appeal of this genre for the consoles market, straightening the road to the current tendency to release most titles as cross-platform, like it happened to games in the ''Far Cry'' and ''Call of Duty'' series.
Definition First-person shooters are a type of shooter game that relies on a first-person point of view with which the player experiences the action through the eyes of the character. They differ from third-person shooters in that, in a third-person shooter, the player can see the character they are controlling (usually from behind, or above). The primary design focus is combat, mainly involving firearms or other types of long range weapons.A defining feature of the genre is "player-guided navigation through a three-dimensional space." This is a defining characteristic that clearly distinguishes the genre from other types of shooting games that employ a first-person perspective, including light gun shooters, rail shooters, shooting gallery games, or older shooting electro-mechanical games. First person-shooter games are thus categorized as being distinct from light gun shooters, a similar genre with a first-person perspective which uses dedicated light gun peripherals, in contrast to the use of conventional input devices. Light-gun shooters (like ''Virtua Cop'') often feature "on-rails" (scripted) movement, whereas first-person shooters give the player complete freedom to roam the surroundings.The first-person shooter may be considered a distinct genre itself, or a type of shooter game, in turn a subgenre of the wider action game genre. Following the release of ''Doom'' in 1993, games in this style were commonly referred to as "'''Doom clones'''"; over time this term has largely been replaced by "first-person shooter". ''Wolfenstein 3D,'' released in 1992, the year before ''Doom'', has been often credited with introducing the genre, but critics have since identified similar, though less advanced, games developed as far back as 1973.There are occasional disagreements regarding the specific design elements which constitute a first-person shooter. For example, titles like ''Deus Ex'' or ''BioShock'' may be considered as first-person shooters, but may also fit into the role-playing games category, as they borrow extensively from that genre. Other examples, like ''Far Cry'' and ''Rage'', could also be considered adventure games, because they focus more on exploration than simple action, they task players with multiple different objectives other than just killing enemies, and they often revolve around the construction of complex cinematic storylines with a well defined cast of secondary characters to interact with. Furthermore, certain puzzle or platforming games are also sometimes categorized as first-person shooters, in spite of lacking any direct combat or shooting element, instead using a first-person perspective to help players immerse within the game and better navigate 3D environments (for example, in the case of ''Portal'', the 'gun' the player character carries is used to create portals through walls rather than fire projectiles). Some commentators also extend the definition to include combat flight simulators and space battle games, whenever the cockpit of the aircraft is depicted from a first-person point of view.
Game design Like most shooter games, first-person shooters involve an avatar, one or more ranged weapons, and a varying number of enemies. Because they take place in a 3D environment, these games tend to be somewhat more realistic than 2D shooter games, and have more accurate representations of gravity, lighting, sound and collisions. First-person shooters played on personal computers are most often controlled with a combination of a keyboard and mouse. This system has been claimed as superior to that found in console games, which frequently use two analog sticks: one used for running and sidestepping, the other for looking and aiming. It is common to display the character's hands and weaponry in the main view, with a heads-up display showing health, ammunition and location details. Often, it is possible to overlay a map of the surrounding area.===Combat and power-ups===First-person shooters generally focus on action gameplay, with fast-paced combat and dynamic firefights being a central point of the experience, though certain titles may also place a greater emphasis on narrative, problem-solving and logic puzzles. In addition to shooting, melee combat may also be used extensively. In some games, melee weapons are especially powerful, as a reward for the risk the player must take in maneuvering his character into close proximity to the enemy. In other games, instead, melee weapons may be less effective but necessary as a last resort. "Tactical shooters" tend to be more realistic, and require the players to use teamwork and strategy in order to succeed; the players can often command a squad of characters, which may be controlled by the A.I. or by human teammates, and can be given different tasks during the course of the mission.First-person shooters typically present players with a vast arsenal of weapons, which can have a large impact on how they will approach the game. Some games offer realistic reproductions of actual existing (or even historical) firearms, simulating their rate of fire, magazine size, ammunition amount, recoil and accuracy. Depending on the context, other first-person shooters may incorporate some imaginative variations, including futuristic prototypes, alien-technology or magical weapons, and/or implementing a wide array of different projectiles, from lasers, to energy, plasma, rockets, and arrows. These many variations may also be applied to the tossing of grenades, bombs, spears and the like. Also, more unconventional modes of destruction may be employed by the playable character, such as flames, electricity, telekinesis or other supernatural powers, and traps.In the early era of first-person shooters, often designers allowed characters to carry a large number of different weapons with little to no reduction in speed or mobility. More modern games started to adopt a more realistic approach, where the player can only equip a handheld gun, coupled with a rifle, or even limiting the players to only one weapon of choice at a time, forcing them to swap between different alternatives according to the situation. In some games, there's the option to trade up or upgrade weapons, resulting in multiple degrees of customization. Thus, the standards of realism are extremely variable. The protagonist can generally get healing and equipment supplies by means of collectible items such as first aid kits or ammunition packs, simply by walking over, or interacting with them. Some games allow players to accumulate experience points in a role-playing game fashion, that can generally be used to unlock new weapons, bonuses and skills.===Level design===First-person shooters may be structurally composed of levels, or use the technique of a continuous narrative in which the game never leaves the first-person perspective. Others feature large sandbox environments, which are not divided into levels and can be explored freely. In first-person shooters, protagonists interact with the environment to varying degrees, from basics such as using doors, to problem solving puzzles based on a variety of interactive objects. In some games, the player can damage the environment, also to varying degrees: one common device is the use of barrels containing explosive material which the player can shoot, harming nearby enemies. Other games feature environments which are extensively destructible, allowing for additional visual effects. The game world will often make use of science fiction, historic (particularly World War II) or modern military themes, with such antagonists as aliens, monsters, terrorists and soldiers of various types. Games feature multiple difficulty settings; in harder modes, enemies are tougher, more aggressive and do more damage, and power-ups are limited. In easier modes, the player can succeed through reaction times alone; on more difficult settings, it is often necessary to memorize the levels through trial and error.===Multiplayer===More 21st century first-person shooters utilize the Internet for multiplayer features, but local area networks were commonly used in early games.First-person shooters may feature a multiplayer mode, taking place on specialized levels. Some games are designed specifically for multiplayer gaming, and have very limited single player modes in which the player competes against game-controlled characters termed "bots". Massively multiplayer online first-person shooters like those in the ''PlanetSide'' series allow thousands of players to compete at once in a persistent world. Large scale multiplayer games allow multiple squads, with leaders issuing commands and a commander controlling the team's overall strategy. Multiplayer games have a variety of different styles of match.The classic types are the deathmatch (and its team-based variant) in which players score points by killing other players' characters; and capture the flag, in which teams attempt to penetrate the opposing base, capture a flag and return it to their own base whilst preventing the other team from doing the same. Other game modes may involve attempting to capture enemy bases or areas of the map, attempting to take hold of an object for as long as possible while evading other players, or deathmatch variations involving limited lives or in which players fight over a particularly potent power-up. These match types may also be customizable, allowing the players to vary weapons, health and power-ups found on the map, as well as victory criteria. Games may allow players to choose between various classes, each with its own strengths, weaknesses, equipment and roles within a team.=== Free-to-play ===There are many free-to-play first-person shooters on the market now, including ''Wolfenstein: Enemy Territory'', ''Apex Legends'', ''Team Fortress 2'', ''PlanetSide 2, and Halo Infinite Multiplayer.'' Some games are released as free-to-play as their intended business model and can be highly profitable (''League of Legends'' earned $2 billion in 2017), but others such as ''Warhammer 40,000: Eternal Crusade'' begin their life as paid games and become free-to-play later to reach a wider audience after an initially disappointing reception. Some player communities complain about freemium first-person-shooters, fearing that they create unbalanced games, but many game designers have tweaked prices in response to criticism, and players can usually get the same benefits by playing longer rather than paying.
History ===Origins: 1970s–1980s===Before the popularity of first-person shooters, the first-person viewpoint was used in vehicle simulation games such as ''Battlezone''.The earliest two documented first-person shooter video games are ''Maze War'' and ''Spasim.'' ''Maze War'' was originally developed in 1973 by Greg Thompson, Steve Colley and Howard Palmer, high-school students in a NASA work-study program trying to develop a program to help visualize fluid dynamics for spacecraft designs. The work became a maze game presented to the player in the first-person, and later included support for a second player and the ability to shoot the other player to win the game. Thompson took the game's code with him to Massachusetts Institute of Technology, where with help from Dave Lebling to create an eight-player version that could be played over ARPANET, computer-run players using artificial intelligence, customizable maps, online scoreboards and a spectator mode. ''Spasim'' had a documented debut at the University of Illinois in 1974.The game was a rudimentary space flight simulator for up to 32 players, featuring a first-person perspective. Both games were distinct from modern first-person shooters, involving simple tile-based movement where the player could only move from square to square and turn in 90-degree increments. Such games spawned others that used similar visuals to display the player as part of a maze (such as ''Akalabeth: World of Doom'' in 1979), and were loosely called "rat's eye view" games, since they gave the appearance of a rat running through a maze. Another crucial early game that influenced first-person shooters was ''Wayout''. It featured the player trying to escape a maze, using ray casting to render the environment, simulating visually how each wall segment would be rendered relative to the player's position and facing angle. This allowed more freeform movement compared to the grid-based and cardinal ''Maze War'' and ''Spasim''.A slightly more sophisticated first-person shooting mainframe game was ''Panther'' (1975), a tank simulator for the PLATO system. Atari's first-person tank shooter arcade video game ''Battlezone'' (1980) was released for arcades and presented using a vector graphics display, with the game designed by Ed Rotberg. It is considered to be the first successful first-person shooter video game, making it a milestone for the genre. It was primarily inspired by Atari's top-down arcade shooter game ''Tank'' (1974). The original arcade cabinet also employed a periscope viewfinder similar to submarine shooting arcade games such as Midway's video game ''Sea Wolf'' (1976) and Sega's electro-mechanical game ''Periscope'' (1966). ''Battlezone'' became the first successful mass-market game featuring a first-person viewpoint and wireframe 3D graphics, with a version later released for home computers in 1983.===Early first-person shooters: 1987–1992===''MIDI Maze'', a first-person shooter released in 1987 for the Atari ST, featured maze-based gameplay and character designs similar to ''Pac-Man'', but displayed in a first-person perspective. Later ported to various systems — including the Game Boy and Super NES under the title ''Faceball 2000 ''— it featured the first network multiplayer deathmatches, using a MIDI interface. Despite the inconvenience of connecting numerous machines together, it gained a cult following; 1UP.com called it the "first multi-player 3D shooter on a mainstream system" and the first "major LAN action game".Id Software's ''Hovertank 3D'' pioneered ray casting technology in May 1991 to enable faster gameplay than 1980s vehicle simulators; and ''Catacomb 3-D'' introduced another advance, texture mapping, in November 1991.The second game to use texture mapping was ''Ultima Underworld: The Stygian Abyss'', a March 1992 action role-playing game by Looking Glass Technologies that featured a first-person viewpoint and an advanced graphics engine. In October 1990, id developer John Romero learned about texture mapping from a phone call to Paul Neurath. Romero described the texture mapping technique to id programmer John Carmack, who remarked, "I can do that. ", and would feel motivated by Looking Glass's example to do the same in ''Catacomb 3-D''. ''Catacomb 3-D'' also introduced the display of the protagonist's hand and weapon (in this case, magical spells) on the screen, whereas previously aspects of the player's avatar were not visible. The experience of developing ''Ultima Underworld'' would make it possible for Looking Glass to create the ''Thief'' and ''System Shock'' series years later.===Rise in popularity: 1992–1995===Although it was not the earliest shooter game with a first-person perspective, ''Wolfenstein 3D'' is often credited with establishing the first-person shooter genre and many of its staples. ''Wolfenstein 3D'' (created by id Software as a successor of the successful 1980s video games ''Castle Wolfenstein'' and ''Beyond Castle Wolfenstein'' and released in 1992) was an instant success, fueled largely by its shareware release, and has been credited with inventing the first-person shooter genre. It was built on the ray casting technology pioneered in earlier games to create a revolutionary template for shooter game design, which first-person shooters are still based upon today. Despite its violent themes, ''Wolfenstein'' largely escaped the controversy generated by the later ''Doom'', although it was banned in Germany due to the use of Nazi iconography; and the Super NES version replaced the enemy attack dogs with giant rats. Apogee Software, the publisher of ''Wolfenstein 3D,'' followed up its success with ''Blake Stone: Aliens of Gold'' in 1993 which featured friendly non-player characters in the form of informants that would give the player hints and supplies. The game was initially well-received but sales rapidly declined in the wake of the success of id's ''Doom'', released a week later. ''Doom'', released as shareware in 1993, refined ''Wolfenstein 3D's'' template by adding support for higher resolution, improved textures, variations in height (e.g., stairs and platforms the player's character could climb upon), more intricate level design (''Wolfenstein 3D'' was limited to a grid based system where walls had to be orthogonal to each other, whereas ''Doom'' allowed for any inclination) and rudimentary illumination effects such as flickering lights and areas of darkness, creating a far more believable 3D environment than ''Wolfenstein 3D''s levels, all of which had a flat-floor space and corridors. ''Doom'' allowed competitive matches between multiple players, termed "deathmatches", and the game was responsible for the word's subsequent entry into the video gaming lexicon. According to creator John Romero, the game's deathmatch concept was inspired by the competitive multiplayer of fighting games such as ''Street Fighter II'' and ''Fatal Fury''. ''Doom'' became so popular that its multiplayer features began to cause problems for companies whose networks were used to play the game, causing frequent bandwidth reductions. ''Doom'' has been considered the most important first-person shooter ever made. It was highly influential not only on subsequent shooter games but on video gaming in general, and has been made available on almost every video gaming system since. Multiplayer gaming, which is now integral to the first-person shooter genre, was first successfully achieved on a large scale by ''Doom''. While its combination of gory violence, dark humor and hellish imagery garnered acclaim from critics, these attributes also generated criticism from religious groups and censorship committees, with many commentators labelling the game a "murder simulator". There was further controversy when it emerged that the perpetrators of the Columbine High School massacre were fans of the game; the families of several victims later unsuccessfully attempted to sue numerous video game companies - among them id Software - whose work the families claimed inspired the massacre. In 1994, Raven Software released ''Heretic'', which used a modified version of the ''Doom'' engine that allowed for vertical aiming, an inventory system to store and select items, and gibs. ''Star Wars: Dark Forces'' was released in 1995 after LucasArts decided ''Star Wars'' would make appropriate material for a game in the style of ''Doom''. However, ''Star Wars: Dark Forces'' improved on several technical features that ''Doom'' lacked, such as the ability to crouch, jump, or look and aim up and down. ''Dark Forces'' also was one of the first games to incorporate 3D-designed objects rendered into the game's 2.5D graphics engine.Apogee's ''Rise of the Triad'' began as a sequel to ''Wolfenstein 3D'', but was soon altered and became a stand-alone game released in 1995.The game included "ludicrous" gibs, bullet holes persisted, and sheets of glass could be shattered by shooting or running through them. Apogee followed up with ''Duke Nukem 3D'' (sequel to the earlier platformers ''Duke Nukem'' and ''Duke Nukem II''), released in 1996, which ran on the Build engine and was "the last of the great, sprite-based shooters." ''Duke Nukem 3D'' won acclaim for its humour based around stereotyped machismo as well as its adrenalinic gameplay and graphics. However, some found the game's (and later the whole series') treatment of women to be derogatory and tasteless.Most shooters in this period were developed for IBM PC compatible computers. On the Macintosh side, Bungie released its first shooter, ''Pathways into Darkness'' in 1993, which featured more adventure and narrative elements alongside first-person shooter gameplay. ''Pathways'' had been inspired by ''Wolfenstein 3D'', and born out of an attempt to take their previous top-down dungeon exploration game ''Minotaur: The Labyrinths of Crete'' into a 3D setting. In the subsequent year, Bungie released ''Marathon'', which streamlined concepts from ''Pathways'' by eliminating role-playing elements in favor of the shooter action. ''Marathon'' was highly successful, leading to two sequels to form the ''Marathon Trilogy'', and becoming the standard for first-person shooters on that platform. ''Marathon'' pioneered or was an early adopter of several new features such as default freelook, dual-wielded and dual-function weapons, versatile multiplayer modes (such as King of the Hill, Kill the Man with the Ball, and cooperative play), and friendly non-player characters (NPCs). The ''Marathon'' games also had a strong emphasis on storytelling in addition to the action, which would continue in Bungie's future projects, like ''Halo'' and ''Destiny''.===Advances in 3D graphics: 1995–1999===In 1994, Japanese company Exact released ''Geograph Seal'' for the Sharp X68000 home computer. An obscure import title as far as the Western market is concerned, it was nonetheless an early example of a 3D polygonal first-person shooter, with innovative platform game mechanics and free-roaming outdoor environments. The following year, Exact released its successor for the PlayStation console, called ''Jumping Flash! '', which placed more emphasis on its platform elements. ''Descent'' (released by Parallax Software in 1995), a game in which the player pilots a spacecraft around caves and factory ducts, was among the earliest truly three-dimensional first-person shooters. It abandoned sprites and ray casting in favour of polygonal models and allowed movement through all of the six possible degrees of freedom.Shortly after the release of ''Duke Nukem 3D'', in 1996, id Software released the much anticipated ''Quake''. Like ''Doom'', ''Quake'' was influential and genre-defining, featuring fast-paced, gory gameplay, within a completely 3D game environment, and making use of real-time rendered polygonal models instead of sprites. It was centered on online gaming and featured multiple match types still found in first-person shooter games today. It was the first FPS game to gain a cult following of player clans (although the concept had existed previously in ''MechWarrior 2'''s ''Netmech'', with its ''Battletech'' lore as well as amongst MUD players), and would inspire popular LAN parties and events such as QuakeCon. The game's popularity and use of 3D polygonal graphics also helped to expand the growing market for video card hardware; and the additional support and encouragement for game modifications attracted players who wanted to tinker with the game and create their own modules. According to creator John Romero, ''Quake''s 3D world was inspired by the 3D fighting game ''Virtua Fighter''. ''Quake'' was also intended to expand the genre with ''Virtua Fighter'' influenced melee brawling, but this element was eventually scrapped from the final game.Based on the James Bond film, Rare's ''GoldenEye 007'' was released in 1997, and as of 2004 it was still the best-selling Nintendo 64 game in the United States. It has been the first landmark first-person shooter for console gamers and was highly acclaimed for its atmospheric single-player campaign and well designed multiplayer maps. It featured a sniper rifle, the ability to perform head-shots, and the incorporation of stealth elements  (all of these aspects were also included in the game's spiritual sequel, ''Perfect Dark'') as well as some ''Virtua Cop''-inspired features such as weapon reloading, position-dependent hit reaction animations, penalties for killing innocents, and a newly designed aiming system that allowed players to aim at a precise spot on the screen.Though not the first of its kind, ''Tom Clancy's Rainbow Six'' started a popular trend of tactical first-person shooters in 1998.It featured a team-based, realistic design and themes based around counter-terrorism, requiring missions to be planned before execution and in it, a single hit was sometimes enough to kill a character. ''Medal of Honor'', released in 1999, gave birth to a long running proliferation of simulative first-person shooters set during World War II.Valve's ''Half-Life'' was released in 1998, based upon ''Quake''s graphics technology. Initially met with only mild anticipation, it went on to become a commercial success. While most of the previous first-person shooters on the IBM PC platform had focused on visceral gameplay with relatively weak or irrelevant plots, ''Half-Life'' placed a far bigger focus on strong narrative; the game featured no cut scenes but remained in the first-person perspective at all times. It capitalized heavily on the concepts of non-enemy characters (previously featured in many other titles, such as the ''Marathon series'' and ''Strife'') and wider in-game interactivity (as first introduced by the likes of ''Duke Nukem 3D'' and ''System Shock'') but did not employ power-ups in the traditional sense, making for a somewhat more believable overall experience. The game was praised for its artificial intelligence, selection of weapons and attention to detail and "has since been recognized as one of the greatest games of all time" according to GameSpot. Its sequel, ''Half-Life 2'', (released in 2004), was less influential though "arguably a more impressive game". ''Starsiege: Tribes,'' also released in 1998, was a multiplayer online shooter allowing more than 32 players in a single match. It featured team-based gameplay with a variety of specialized roles, and an unusual jet pack feature. The game was highly popular and later imitated by many other titles such as the ''Battlefield'' series. Id's ''Quake III Arena'' and Epic's ''Unreal Tournament,'' both released in 1999, became the real milestones for multiplayer gaming, thanks to their incredible graphics and frenetic, yet accessible and perfectly balanced online modes; on the other hand, both games only featured a very limited single player campaign designed for a more "disposable" arcade approach. ''Counter-Strike'' was also released in 1999, a ''Half-Life'' modification with a counter-terrorism theme copied from ''Rainbow Six''. The game and later version ''Counter-Strike: Source'' (2004) went on to become the most popular multiplayer game modification ever, with over 90,000 players competing online at any one time during its peak.===Online wars and return of the console: 2000–2008===At the E3 game show in 1999, Bungie unveiled a real-time strategy game called ''Halo''; aka Halo CE at the following E3, an overhauled third-person shooter version was displayed. In 2000, Bungie was bought by Microsoft. ''Halo'' was then revamped and released as a first-person shooter; it was one of the launch titles for the Xbox console. It was a runaway critical and commercial success, and is considered a premier console first-person shooter. It featured narrative and storyline reminiscent of Bungie's earlier Marathon series but now told largely through in-game dialog and cut scenes. It also received acclaim for its characters, both the protagonist, Master Chief and its alien antagonists. The sequel, ''Halo 2'' (2004), brought the popularity of online gaming to the console market through the medium of Xbox Live, on which it was the most played game for almost two years. ''Deus Ex'', released by Ion Storm in 2000, featured a levelling system similar to that found in role-playing games; it also had multiple narratives depending on how the player completed missions and won acclaim for its serious, artistic style. The ''Resident Evil'' games ''Survivor'' in 2000 and ''Dead Aim'' in 2003 attempted to combine the light gun and first-person shooter genres along with survival horror elements. ''Metroid Prime,'' released in 2002 for the GameCube, a highly praised first-person shooter, incorporated action adventure elements such as jumping puzzles and built on the ''Metroid'' series of 2D side-scrolling platform-adventures. Taking a "massive stride forward for first-person games", the game emphasized its adventure elements rather than shooting and was credited by journalist Chris Kohler with "breaking the genre free from the clutches of ''Doom''".Efforts to develop early handheld video games with 3-D graphics have eventually led to the dawn of ambitious handheld first-person shooter games, starting with two Game Boy Advance ports of ''Back Track'' and ''Doom'' not long after the system was launched in 2001.The GBA eventually saw the release of several first-person shooter games specifically tailored for it, including ''Duke Nukem Advance'', ''Ecks vs. Sever'' and ''Dark Arena'', with a sizable amount of them being praised for pushing the hardware to the limit while providing satisfying gameplay. Despite their varying reception, they would demonstrate the viability of first-person shooters on handhelds, which became more apparent with new technological advances that accompanied future handheld systems. ''World War II Online'', released in 2001, featured a persistent and "massively multiplayer environment", although IGN said that "the full realization of that environment is probably still a few years away." ''Battlefield 1942'', another World War II shooter released in 2002, featured large scale battles incorporating aircraft, naval vessels, land vehicles and infantry combat. In 2003, ''PlanetSide'' allowed hundreds of players at once to compete in a persistent world, and was also promoted as the "world's first massively multiplayer online first person shooter." The ''Serious Sam'' series, first released in 2001, and ''Painkiller'', released in 2004, both emphasized fighting waves of enemies in large open arenas, in an attempt to hearken back to the genre's roots. ''Doom 3'', released in 2004, placed a greater emphasis on horror and frightening the player than previous games in the series and was a critically acclaimed best seller, though some commentators felt it lacked gameplay substance and innovation, putting too much emphasis on impressive graphics. In 2005, a film based on ''Doom'' featured a sequence that emulated the viewpoint and action of the first-person shooter, but was critically derided as deliberately unintelligent and gratuitously violent. In 2005, ''F.E.A.R.'' was acclaimed for successfully combining first-person shooter gameplay with a Japanese horror atmosphere. Later in 2007, Irrational Games' ''BioShock'' would be acclaimed by some commentators as the best game of that year for its innovation in artistry, narrative and design, with some calling it the "spiritual successor" to Irrational's earlier ''System Shock 2''.Finally, the Crytek games ''Far Cry'' (2004) and ''Crysis'' (2007) as well as Ubisoft's ''Far Cry 2'' (2008) would break new ground in terms of graphics and large, open-ended level design, whereas ''Call of Duty 4: Modern Warfare'' (2007), ''Resistance: Fall of Man'' (2006) and its sequel ''Resistance 2'' (2008) presented increasingly refined linear levels and narratives, with the fast pace and linearity of the ''Call of Duty'' games bearing a resemblance to rail shooters. BLACK in 2006 was considered to be a leader in cinematic game design, with strong sound design and destructible environments. In 2007, ''Portal'' popularized the concept of puzzles mechanics in first-person perspective. In 2006, Gamasutra reported the first-person shooter as one of the biggest and fastest growing video game genres in terms of revenue for publishers.===2008–present===''Team Fortress 2'', originally a user-made mod for ''Quake'' but made into an official product by Valve by its release in 2007, launched a new type of team-based subgenre called hero shooters, which consist of first-person and third-person shooters where players selected from one of several pre-made characters with existing weapons and skill sets, using those different characters effectively to complete objectives against their opponents. The hero shooter genre had significant growth following the release of ''Overwatch'' in which refined the hero shooter formula by adding unique characters and larger narrative as they expanded the game in future updates.The use of motion-detecting game controllers – particularly the Wii's – "promised to make FPS controls more approachable and precise with an interface as simple as literally pointing to aim" and thus "dramatically reshape the first-person shooter." However, technical difficulties pertinent to functions other than aiming – such as maneuvering or reloading – prevented their widespread use among first-person shooters.The Pointman user interface combines a motion-sensitive gamepad, head tracker and sliding foot pedals to increase the precision and level of control over one's avatar in military first-person shooter games.2011 shooter ''Xonotic''In the late 2010s, first-person and third-person shooters enjoyed a surge in popularity with the rise of battle royale games, in which many players battle for survival on a large map to be the last man or team standing through intense action-packed combat, and ''PlayerUnknown's Battlegrounds'' (2017) reached the highest number of concurrent players ever to be recorded on Steam. Its free-to-play mobile game version, ''PUBG Mobile'' (2018), reached over  downloads worldwide by early 2021 and grossed over  by early 2022.As Virtual Reality VR technologies are being developed, FPS games are being developed right along-side the various VR gaming platforms. The new immersive 3D environments using VR headsets and motion controllers enable some entirely unique experiences and mechanics for FPS games, such as physically ducking / dodging, precise control for throwing objects, and individual finger control, enhancing the interactivity with in-game wearables and other objects in the environment. VR Games naturally have a greater focus on the players' spatial presence and the 3D environment itself rather than the actual challenge / competitiveness of the game, which also extends to first-person shooters, especially in the horror sub-genre. Half-Life Alyx''',''' released in 2020, is to date (2023) the highest grossing VR first-person shooter and is usually considered the first AAA title in VR. While there is much hype in the Virtual Reality arena, it is still an emerging technology, and it has yet to be determined if VR FPS titles will become mainstream competitive or how these platforms will influence the genre in the future.
Research In 2010, researchers at Leiden University showed that playing first-person shooter video games is associated with superior mental flexibility. Compared to non-players, players of such games were found to require a significantly shorter reaction time while switching between complex tasks, possibly because they are required to develop a more responsive mindset to rapidly react to fast-moving visual and auditory stimuli, and to shift back and forth between different sub-duties.
See also * First-person shooter engine* List of first-person shooters* Social interaction and first-person shooters* Violence and video games
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