If you like RPGs i strongly recommend the first Deus Ex, Vampire the Masquerade - Bloodlines and Arx Fatalis (fantasy setting in this one).

For shooters you can't go wrong with the classic ones like DooM, Duke Nukem, Blood, Painkiller, Unreal or Quake.
Merry Christmas!

Sorry I've got no suggestions, but Happy Holidays and thanks for sharing the beat.

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Thanks!

Thanks for the giveaway and happy holidays! =)

First game that came to my mind was N, I really liked it.

Thank you :)

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You probably know about all the source games, but yea, gmod, haflife, tf2, all fun games. lots of games on the humble bundles work great and bad computers. Faster than Light is also extremely fun and will work great on slow computers.

ty

Frog Fractions, and be sure to check your surroundings.

Audiosurf, Jamestown, Binding of Isaac maybe, HammerWatch, that's what comes to my mind right now :)

Thanks

Thank you soo much for this giveaway :D Merry Christmas !!

ty

Thanks!