Playing Lost planet 2 co-op right now as its my day off work but ill probably play bad company 2 later witch is one of the best fps imo, its got a good story but dosnt take itself to seriously like most games today and makes fun of itself.
The multyplayer is also the best there is, better than mw2 by a longshot, fully destuctable enviroment, tons of weapons, vehicles etc, great game modes and heaps of fun to play online with a bunch of mates using the headsets so you can coordinate and have a laugh. I give Bad company 2 a 9 out of ten, bad company 1 gets a 7 and a half to 8 out of ten. I own both on the xbox 360.
The only other platforms i have are the DS lite and the GP32 with i rarely play. Super mario kart for the DS is good and the the GP32 i play allot of old games, sega and nintendo games mostly.