Games like Skyrim, Mass Effect and Borderlands usually get talked about so much that other games get forgotten about (some more than others).
What is a game that you really enjoy that you feel doesn't get the attention or praise that it deserves?
Darksiders II - While not necessarily FORGOTTEN, it definitely got covered up by Borderlands 2 and then Resident Evil 6 (which is obviously a more popular title).
Bulletstorm - Developers failed to make a profit off this game, but it's so freaking fun, finished it twice, cheesy but funny dialogue and so much more creative and fun than your average military shooters
Dante's Inferno - Most gamers and reviewers called it a God of War clone, but it was a fun and gruesome experience, good voice acting and story telling
Split/Second: Velocity & FlatOut: Ultimate Carnage - Both scored well, but both seemed to fall off the radar of general gamer consciousness. Speed, wanton destruction and over-the-top arcade racing are supplied by both in spades, and they are easily my favorite titles of the genre.