The title screen of the game.

geneatd

Multi-touch tower defense game

crayon based physics puzzle game

numptyphysics

crayon based physics puzzle game

Numpty Physics is a drawing puzzle game in the spirit (and style?) of Crayon Physics using the same excellent Box2D engine. It melds cute schoolbook-style graphics with a kind of realistic physics engine.
In-game

anagramarama

fast paced anagram puzzle game using SDL

Multiplayer online game set in a fantasy world

runescape

Multiplayer online game set in a fantasy world

This software is a simple script that downloads and runs the Old School Runescape client file on unofficial GNU/Linux distributions.
dungeon crawl game - X11 interface

nethack-x11

dungeon crawl game - X11 interface

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.
Fly through an asteroid field avoiding rocks and greeblies

rockdodger

Fly through an asteroid field avoiding rocks and greeblies

Rock Dodger is a horizontal scrolling action game where you have to navigate your spaceship through a stream of rocks flying in from the right. Your only help is a laser to destroy rocks and a limited amount of shield. This game had once upon in time the 4th place in NoStarch game contest.