BOH is an original, retro-flavoured game of exploration and action.
You move in claustrophobic, traps-packed, mind-boggling battlefields searching for the Evil Masters, who throw countless enemies at you until you discover and face them in the final battle. Read more
GNU Robbo is a famous atari XE/XL game ported to Linux. Robbo the robot is trying to get out of the planet. He must collect all parts of capsule to move to next level.
OBSIDIAN is an extensible virtual world system with a fullblown multiplayer client-server architecture. It is NOT a VRML2 world system (there are fundamental computer graphics reasons why VRML worlds will always be slow), though there are plans to include VRML2 as a world data format. Features include: Multiplayer Client-Server architecture, Editable worlds and textures, and projectile weapons.