So hidden that it hasn't even been mentioned on the "hidden gaming gems of 2011" thread after 3 pages, I'm saying indie puzzle game Hamilton's Great Adventure. I got 10+ hours of fun from this and felt bad for only giving them $2.50 (75% off a Steam sale). It has a great balance of thinking up what to do and quickly executing the solution (particularly later on). Knocked it over in a few days because I found it hard to stop playing.
Renegade Ops also seemed to receive little fanfare, but I had a blast with it and I'll pick up the DLC soon and replay the whole thing. Great downloadable title from the Just Cause series developers.
Renegade Ops also seemed to receive little fanfare, but I had a blast with it and I'll pick up the DLC soon and replay the whole thing. Great downloadable title from the Just Cause series developers.