Yes you read the title, TELL ME
edit: NOTHING FROM THE COD SERIES
AvP - Predators weapon on his(?) shoulder.
Magnet Gun / Black Hole Gun - Red Faction: Armageddon
Purple Dildo - Saints Row III
Gravity Gun - Half Life I, II, II:EP1, II:EP2
Claws - Prototype
Portal Gun - Portal I, II
Can it be movies too?
Fatman with Nukes from Fallout
Scar(MK16/17) from OPF Dragon Rising
Machete from Far Cry 2
S&W M500 (MAG) from Resident Evil 5
Predator Hands from AVP like Lemo says
MP7 from Rainbow Six Vegas 2 or 1
Bastard from Metro 2033
Laser Sword from Star Wars
Diamond Sword from Minecraft =D
halo 3 gravity hammer or energy sword
Yamato cannon from starcraft 2 that stuns people for a few seconds teehee
BFG from Doom (Big Fuckin Gun)