Some of the textures and symbols that appear in the game are very similar to some of those found in Quake. Enemies demonstrate visible wounds after they have taken damage. Multiplayer The multiplayer portion is similar to that of Quake. It can be played as a free-for-all deathmatch game mode, a cooperative version of the single-player game, or as a 1 vs 1 match that is used in official tournaments, like the Cyberathlete Professional League. It can also be played in Capture the Flag mode (CTF). The deathmatch game benefited from the release of eight specifically designed levels that id Software added after the game's initial release. They were introduced to the game via one of the early patches, that were released free of charge. Prior to the release of these maps, players were limited to playing multiplayer games on the single-player levels, which, while functional as multiplayer levels, were not designed with deathmatch gameplay specifically in mind. As in Quake, it is possible to customize the way in which the player appears to other people in multiplayer games. However, whereas in Quake, the only option was to change the color of the player's uniform unless third party modifications were used, now the game comes with a selection of three different player models: a male marine, a female marine, and a male cyborg; choice of player model also affects the speech effects the player's character will make, such as exhaling in effort while jumping or groaning when injured. Each model can be customized from in the in-game menu via the selection of pre-drawn skins, which differ in many ways; for example, skin color, camouflage style, and application of facepaint. Plot Quake II takes place in a science fiction environment. In the single-player game, the player assumes the role of a Marine named Bitterman taking part in "Operation Alien Overlord", a desperate attempt to prevent an alien invasion of Earth by launching a pre-emptive attack against the home planet of the hostile Strogg civilization. Most of the other soldiers are captured or killed as soon as they approach the planned landing zone. Bitterman survives because another Marine's personal capsule collided with his upon launch, causing him to crash far short of the landing zone. Bitterman fights his way through the Strogg city, destroying strategic objectives along the way, and finally kills the Strogg leader, the Makron in his orbital asteroid base.