A new version of the Invasion mod for Quake 3 has been released, adding working bots and a radar among other things. What is Invasion? "Invasion is a mod for Quake 3 where Marines fight vs Aliens. The goal of the marines is to bring back the Alien Egg. The game is round based. Marines have only one life per round, different types of armor and weapons, and Aliens have infinite respawn and some usefull powers."