The following guns appear in the video game:
Handguns
An original Beretta 92 is used by almost all characters in the game and a silenced version is available.
Its actually a Beretta 92FS, as you can view the high poly model in the weapon selection menu.
47's Favorite weapon. Only game in the series to refer it by its original name.
Submachine Guns
Assault Rifles
Incorrectly the M16A2 can be seen firing in full auto mode
Sniper Rifles
Machine Guns
Shotguns
Other