Toga II is a computer game chess engine created by Thomas Gaksch. It has big chess knowledge, multi-processor support, and a good search algorithm. It is based on Fruit and is free. Experimental versions of Toga II running on computer clusters have competed in the World Computer Chess Championship.

OpenArena is an open-source content package for the Quake III engine, effectively creating a free stand-alone game similar to Quake III Arena.

NetHack is a wonderfully silly, yet quite addictive, Dungeons & Dragons-style adventure game. You play a character from one of many classes (such as wizard, ranger, or tourist), fighting your way down to retrieve the Amulet of Yendor (try saying THAT one backwards!) for your god. On the way, you might encounter a quantum mechanic or two, or perhaps King Arthur, or - if you're REALLY lucky - the Ravenous Bugblatter Beast of Traal.

This package contains a launcher script and init script to run a Quake II server automatically, with any suitable engine.

This metapackage will install a selection of outstanding Debian games representing almost all genres and styles. They were chosen based on multiple factors namely popularity (popcon value), unique gameplay, look and feel, aesthetics, fun factor and a good portion of subjectivity.