The latest and biggest thing to hit the indie PC game scene is Stealth Bastard. You’ve read about it; you’ve heard of it; you’ve played it. Yes, you have. It’s free. That’s how I know you know about it.
To summarise, it’s a freeware 2D platforming title developed by London-based developer, Curve Studios. It’s similar to Metal Gear Solid and Splinter Cell in theme, but more like Abuse (that old game for MS-DOS) or even Oddworld: Abe’s Odyssey in the way that it plays. There’s stealth, death, and that sort of thing, but much more fast-paced than any stealthy FPS title.
Anyway, I downloaded it recently and gave it a go, and managed to actually write a 1500 word review on it. Don’t quite know how, though. You can go through to the piece on HP, if you care.