World of Padman (or WoP for short) features a cartoon-style approach, with maps, characters, weapons and sounds all based upon the Padman animation series.

Urban Terror (or UrT for short, not to be confused with Unreal Tournament) is a great standalone first-person shooter available for Linux too, using the ioQuake3 engine.

Eschalon is a turn-based RPG (role-playing game), which tries to reproduce the feeling of classic RPG games. It's closed-source, available for Linux, Mac OS X and Windows, and it comes with a demo too. The full version is available as a download for $19.95.

Wolfenstein: Enemy Territory
A true classic and one of the most played online first-person shooter games, Wolfenstein: ET was supposed to be released as a new mod for Return to Castle Wolfenstein, but the single-player part of the game was abandoned and it was released at no cost, as a standalone multiplayer game.

getdeb.net, a leading provider of new and updated programs for Ubuntu is announcing the start of a gaming repository for Ubuntu.