So we have applied GPLv3 license to our SDL2 video game: "TetriCrisis 4 110% A.I. Turbo".
It's not our best game, but damn close to it...
http://16bitsoft.com/files/offline/TC4T-WinLinux-Retail1.zip
Click below to play our "best" game:
http://OpenTetris.com
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JeZxLee
16BitSoft Inc.
Video Game Design Studio
http://www.16BitSoft.com