Do you need free/open source game for Ubuntu / Linux? Then visit this site: http://www.happypenguin.org
The title of this site is: “The Linux Game Tome” . You’ll find lots of game here for linux distribution.
The Linux Game Tome was started by Tessa Lau in 1995 when the phrase “Linux game” meant either sasteroids or xtetris. She culled the best games from sunsite’s Linux games directories, scoured the net for classic X11 games, and put together a compendium of amusing ways to waste time. After two years of regular updates, the Tome started to sprout cobwebs as its creator lost interest in downloading the latest and greatest in Linux entertainment.