Its coming also and if you search a bit there some people that try to make some opensource games. Like http://sauerbraten.org/screenshots.html
http://www.planeshift.it/
And some try to buy one and make it open source http://www.virtualcitizenship.org/
Some sites with list of games that are open source. ( much are indeed looking bad..)
http://en.wikipedia.org/wiki/List_of_open_source_games
http://opensource-games.startpagina.nl/
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