Ratchet & Clank are not underrated.
Finally someone said it. Ratchet & Clank series makes part of PS3's overrated exclusives list.
Anyway, more underrated games I like:
Driver: San Francisco
- Fun and pretty addicting sandbox driving game.
Call of Juarez: The Cartel
- Absolutely slaughtered by reviews, I didn't find it nowhere near as bad as reviewers said. I game with faults, but still more unique than CoD or BF.
Red Faction: Armageddon
- Okay, so it wasn't a sandbox, like Guerrilla, but it was pure mindless fun and I had a blast with it.
Call of Duty: World at War
- It had probably the best campaign out of the series, still, I never see anyone mention this game, everyone always talks about Black Ops or Modern Warfares.