Fun split scream games for PS3?

[Table]

Roomate has a PS3, ive got a 42 inch TV. We want to make some sweet magic happen. What are some good split screen games for the PS3? Cheap games are good, and we basically havnt played any ps3 games, so give us your best ideas!

 

[Kinsaras]

Borderlands 1 & 2 for sure.

Killzone 3
Resistance 1 & 3 (not 2)
Uncharted 3 - no campaign co-op though, more like horde mini-story mode
Army of Two 1&2
Little Big Planet 1&2
Little Big Planet Karting
Playstation All-Stars Battle Royale

 

[apcviewer]

Portal 2 co-op, if you haven't already played it on the PC.

 

[guitarslingerchris]

Blur is hands down the game I've put the most hours into split-screen.

 

[DeathPrincess]

Twisted Metal (can do campaign)

 

[DF-1]

The best Co-op game ive played is ratchet and clank all 4 one.

I tried some shooters, but theyve all been "meh" to Co-op (call of dutys, resistance 3)