their own "DOTA-style" games, including Heroes of Newerth (2009), League of Legends (2010), and the mod's standalone sequel, Dota 2 (2013). Blizzard Entertainment, the owner of Warcraft property, developed a game inspired by DotA titled Heroes of the Storm (2015), which features an array of heroes from Blizzard's franchises, including numerous heroes from Warcraft III. Former game journalist Luke Smith called DotA "the ultimate RTS". Since its first title was released in 2000, the Total War series by the Creative Assembly has sold over 20 million copies, becoming one of the most successful series of strategy games of all time. Subgenres 4X 4X games are a genre of strategy video game in which players control an empire and "explore, expand, exploit, and exterminate". The term was first coined by Alan Emrich in his September 1993 preview of Master of Orion for Computer Gaming World. Since then, others have adopted the term to describe games of similar scope and design. 4X games are noted for their deep, complex gameplay. Emphasis is placed upon economic and technological development, as well as a range of non-military routes to supremacy. Many 4X games also fit into the category of grand strategy. Games can take a long time to complete since the amount of micromanagement needed to sustain an empire scales as the empire grows. 4X games are sometimes criticized for becoming tedious for these reasons, and several games have attempted to address these concerns by limiting micromanagement. The earliest 4X games borrowed ideas from board games and 1970s text-based computer games. The first 4X games were turn-based, but real-time 4X games are also not uncommon. Many 4X games were published in the mid-1990s, but were later outsold by other types of strategy games. Sid Meier's Civilization and the Total War series are important examples from this formative era, and popularized the level of detail that would later become a staple of the genre. In the new 2000 millennium, several 4X releases have become critically and commercially successful. Artillery Artillery is the generic name for either early two- or three-player (usually turn-based) computer games involving tanks fighting each other in combat or similar derivative games. Artillery games are among the earliest computer games developed; the theme of such games is an extension of the original uses of computer themselves, which were once used to calculate the trajectories of rockets and other related military-based calculations. Artillery