I will post this in the modern section due to half of the games being current. I recently had a good friend come up by train to my house only to be snowed in for a couple of days. The gaming sessions were great we played the following. Needless to say we had a blast. Share your stories of what you have been playing while dealing with the weather!
Call of Duty World at War(PS3)
Blast Works(Wii)
Alien Syndrome(Wii)...underrated little gem
Mega Man 9(Wii)...Played this one a ton, got to Wilys Castle
Stubbs the Zombie(Xbox)..Co op fun
Warhawk(PS3)
For the retro gaming goodness
Robotron 2084 (7800) one person controlled the movement, the other was the gunner
Streets of Rage 2(Genesis) Co op
Golden Axe III(PS2 Genesis Collection) Co op