Dead Cyborg 1: The Beginning of the Death
Dead Cyborg might seem like just another first person shooting game, but it actually has its charm. Developed by Barathe Endre, only the first episode is finished so far but it's been receiving good reviews since it first came out.
This science fiction shooter game is offered at a pay-what-you-want download. All the donations are used to help fund the development of the succeeding episodes; with each episode geared at providing at least 2-3 hours worth of gameplay.
The game works on a variety of systems including the top three: Linux, Windows and Mac and is certainly worth checking out.