realistic first-person-shooter

 AssaultCube, formerly ActionCube, is a first-person-shooter based on the
 game Cube.
 .
 Set in a realistic looking environment, as far as that's possible with this
 engine, while gameplay stays fast and arcade. This game is all about team
 oriented multiplayer fun.
 .
 The game data required to play this game will be downloaded automatically
 when this package is installed.