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Killing Floor, Crysis Wars, The Walking Dead, Borderlands 1 GOTY, DOTA 2, Back to the Future EP1-5, Jurassic Park the Game, Tales of Monkey Island Ep1-5
All the above for Black Ops 1 & 2
Any 3 of these keys: Blood Bowl: Legendary Edition, Company of Heroes: Tales of Valor, McPixel, NightSky, or Waking Mars.
For Walking Dead?
Killing Floor, Crysis Wars, The Walking Dead, Borderlands 1 GOTY, DOTA 2, Back to the Future EP1-5, Jurassic Park the Game, Tales of Monkey Island Ep1-5
All the above for Black Ops 1 & 2