burningdragoon said:
Resident Evil 5
LittleBigPlanet
Dynasty Warriors (or any Warriors game)
I don't know if Dead Island can do local co-op
I think the Halo games have co-op that's not just a watered down mini-campaign.
It's actually the entire campaign. The AI actually change their tactics and there's more enemies in Reach.
(EDIT: Herp-flerp-a-derp: I re read what you wrote and you said
not a watered down version of the campaign. Well I've made a fool of my self.)
OT:
Go to cooptimus.com
Gears of War Series;
Halo Series;
Army of TWO and Army of TWO: the 40th Day;
Marvel Ultimate Alliance 1&2 (People will argue over which is best);
Left 4 Dead 1&2;
Sports games (MBL the show for baseball, NFL xx where x is the year for NFL, NBA2Kx for basketball, Forza 4 or Gran Turismo 4 for racing, and FIFA xx for Association Football.);
LEGO games (Harry Potter, Pirates of the Caribbean, Indiana Jones, Batman 1&2, Star Wars);
Dynasty Warriors series;
The Legend of Aang: Avatar the Burning Earth (also the easiest 1000 gamer score in the galaxy if that's something you care about);
Hero series or Rock Band series: (DJ Hero, Guitar Hero etc.);
Borderlands;
Skylanders: Spyro's Adventure.
More if you tell me what you like and I can think of any.
EDIT: Portal 2, Castle Crashers, Scott Pilgrim vs the World.