Psychosis Gun from Top Secret Weapons in Games

he Psychosis Gun is a secret experimental weapon found in Perfect Dark and Perfect Dark Zero. It carries 8 rounds in the magazine like the Tranquilizer (whose model and ammunition it shares), though it's impossible to have a full magazine under normal circumstances. It's the only weapon that is unaffected by the Unlimited Ammo cheats, the only weapon without a secondary function (other than the weapons from Goldeneye), and the only weapon unavailable in the Combat Simulator and the Firing Range (for obvious reasons). This weapon also does no damage whatsoever.