Here are the weapons used in the movie and the game:
Pistols:
PP7 Special Issue
PP7 (Silenced)
DD44 Dostovei
Cougar Magnum
Golden Gun
Silver PP7
Gold PP7
Automatics:
Klobb
KF7 Soviet
ZMG (9mm)
D5K Deutsche
D5K (Silenced)
Phantom
U.S. AR33 Assault Rifle
RC-P90
Knives:
Hunting Knife
Throwing Knife
Other:
Unarmed
Shotgun
Automatic Shotgun
Sniper Rifle
Military Laser
Watch Laser
Taser
Explosives:
Grenade Launcher
Rocket Launcher
Grenade
Timed Mine
Proximity Mines
Remote Mine
Tank
If you want to see some pics of the real versions of these weapons, go to this website: Real Guns