Games like Half-Life: Source on Steam
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Nightmare of Decay
A first-person action horror game set in a nightmarish manor infested with zombies, psychotic cultists, and a horde of other horrors. Utilize an assortment of different weapons in a brutal fight for survival as you try to escape from the Nightmare of Decay.
Counter-Strike: Source
Counter-Strike: Source blends Counter-Strike's award-winning teamplay action with the advanced technology of Source™ technology.
Better Than Dead
A brutal bodycam revenge FPS set in Hong Kong. Slide into bullet time, fight up close, learn each environment's rhythm, and turn every run into a faster, bloodier revenge scene.
Classic Marathon 2
From the team that brought you Aleph One, the classic sci-fi FPS Marathon 2: Durandal from Bungie on Mac revived for modern hardware by the fan community.
Oblivity - Find your perfect Sensitivity
Oblivity is an advanced aim training software that provides everything you need to improve your aim! Find your perfect, intuitive mouse sensitivity with Oblivity's sensitivity finder. Or detect your bad aiming habits in the extensive analysis and replay space.