I just picked up Guacamelee! on PSN this evening. This is an amazing 2D Metroidvania-style game which casts you as a humble agave cactus farmer who is magically transformed after death into a mystical luchadore (Mexican wrestler).
The game is getting rave reviews everywhere, and deserves it.
Fantastic controls, great visuals, funny and topical humor, and great game pacing make this easily one of the best games for the PS Vita.
The game features cross-buy and cross-save so you can play it on either PS3 or PS Vita with a single purchase (trophies are unified, so only one set of trophies that can be earned on either version, but there's a platinum trophy for the game for those who care).
Buy this game, folks. It's great!