Transformers: War For Cybertron
Mushroom Wars
Zero Escape: Virtue's Last Reward
When Vikings Attack!

All I think were underrated because of lack of sales.


Edit: Also Blue Toad Murder Files: The Mysteries of Little Riddle i think was underrated because nobody ever talks about it or even seems to know it's even alive.

Playstation All-Stars is one of the best games I've played this gen, and is the most fun I've had in a game this gen.