God of War: Chains of Olympus
Crisis Core: Final Fantasy VII
Ratchet and Clank: Size Matters
Daxter is supposedly a good game, but I bought it and I admit it's pretty good, but I don't see what's so "amazing" about it (which is why I'm only 23% into the game >_>) so it's your choice on that one.
I thought Untold Legends: Brotherhood of the Blade was pretty awesome, even if it was repetitive, it's still pretty cool IMO. There's also the 2nd one, Untold Legends: The Warrior's Code, that one is cool too, but not as good as the 1st one, but the good thing is that is has online play unlike the 1st one, and you can do online co-op in the story mode, deathmatch, team deathmatch, ctf, and more.