GameTree Linux
GameTree Linux is a developer program dedicated to the further development of Cedega, which is a compatibility layer for running Microsoft Windows games on Linux.
There are games that run on Cedega but not on Wine, and games that run on Wine but not Cedega. Users that want to play a specific game usually look for it on the games databases available on the web.
The source code for the program is available, but there are restrictions on redistribution that make it non-free software.
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