http://www.amazon.com/Mark-of-the-Ninja-Download/dp/B00AR03OV0

If you still haven't played this masterpiece, get it now! It's a steal at this ridiculous price. I usually don't really like indie games because of their simplistic mechanics and general lack of depth (except if it's a mobile game) and I didn't like the studio's previous game (Shank 1/2) but Mark of the Ninja is simply brilliant, one of the best stealth games I've played.
Alternatively, you can pay $10 and get it in a pack with 4 more games that are probably nowhere near as good: http://www.amazon.com/dp/B00B1ULJI0/ (ok Deadlight is kinda cool, dunno about the rest)

Do it, Mark of the Ninja is fantastic

Another cool bundle. Condemned: Criminal Origins, Binary Domain, Viking: Battle For Asgard and Hell Yeah! Wrath of the Dead Rabbit for $10. Condemned is great, Binary Domain is great, Viking is a poo pooty console port (and probably not very good) and Hell Yeah is your typical indie 2D platformer (although it looks kinda cool??). Anyway, 10 bucks for Condemned and Binary Domain alone is a great deal. They all register on Steam

http://www.amazon.com/dp/B00CMSCT8O/

Another cool bundle. Condemned: Criminal Origins, Binary Domain, Viking: Battle For Asgard and Hell Yeah! Wrath of the Dead Rabbit for $10. Condemned is great, Binary Domain is great, Viking is a poo pooty console port (and probably not very good) and Hell Yeah is your typical indie 2D platformer (although it looks kinda cool??). Anyway, 10 bucks for Condemned and Binary Domain alone is a great deal. They all register on Steam

http://www.amazon.com/dp/B00CMSCT8O/

Condemned is one of my favorite games of this past gen, not sure how the PC port is but I highly recommend it anyway. Might pick up this bundle to play it again since I've also been meaning to check out Binary Domain for a while.