I have 4 of those games ^ Anyways here's mine.
Xbox 360 (I play this the most): Call Of Duty: Black Ops 2 (Gold Guns: R870 MCS, DSR 50, SVU-AS, Map Packs: Revolution, Vengeance, Camo Packs: Bacon, Graffiti, Cyborg, Dragon)
Wii: Super Mario Galaxy 1/2
DS: Call Of Duty: Black Ops 1/NSMB
3DS Super Mario 3D Land/Mario Kart
PSP (Haven't played it in ages though): Need For Speed: Shift
PC: Rigs of Rods/Roller Coaster Tycoon 3