AssaultCube (formerly ActionCube), is a free first-person-shooter based on the game Cube. Set in a realistic looking environment, as far as possible, while game play stays fast and arcade. This game is all about team oriented multiplayer fun. A lot of effort has gone in to the making of AssaultCube – 9 developers, a $1 million cost with countless hours of hard work. It is a must try for every 3d game lover and open source enthusiast.
Download AssaultCube here