What's your best Co-Op experience?

[Ronster316]

Game i have played more than any other in co-op over the years is Streets of Rage 2, so i'll go with that.

Honourable mentions.......

Dead Rising 2.
Guardian Heroes.
Left 4 Dead 1 & 2.
Gears 1-3.
Saints Row 2.
Resident Evil Revelations (Raid Mode).
Various Halo's.