Quake is a classic first-person shooter game by id Software, released in 1996. This package contains a launcher script and menu entry to play Quake with any suitable engine.

Quake II is a classic first-person shooter game by id Software, released in 1997. This package contains a launcher script and menu entry to play Quake II with any suitable engine.

Sauerbraten is a networked 3D first-person shooter game. It supports modern graphic effects and conveys a sense of fast-paced oldschool gameplay.

Frozen-Bubble is a clone of the popular "Puzzle Bobble" game, in which you attempt to shoot bubbles into groups of the same color to cause them to pop.

Pingus is a free clone of the popular Lemmings game.

SLUDGE is an open source adventure game engine. It combines a scripting language with IDE tools.