I picked Dead Nation and WipEoutHD. Dead Nation is basically passing thorugh levels killing zombies. Search for some gameplay on YT if you wish so. Its quite cool, I like it.
Yet, I must say I prefer LBP, its got a bigger community and many cool features such as level create option, you can customize your character and stuff too.

Best pick would be Infamous + LBP imo, if you don't have those games already.

Btw, I'll try get SuperStardust. Looks kinda crappy but anyway.