"Now, while I do give props for Resistance: Retribution being a fun experience on the bus, this deserves a nod for what it's attempting on the home front as well. If you have a PS3 at home -- and a copy of Resistance 2 -- you can sync up with your PSP and give your character extra powers and unlock different parts of the game. The only downside there being once you end the PSP game, you lose your superpowers until you sync up again.
If you own a PSP, you really have no excuse. Check this out."