Railgun

The Railgun is a prototype anti-air weapon developed to combat the UFO. It fires a special armor piercing round at an extreme muzzle velocity to counter fast aircraft.

The Railgun can be unlocked by capturing all flags on the Coastline map after discovering, at which point Ravenfield's first cutscene will play and a General's Advisor will deliver it to you. 3 direct hits from a railgun is the only thing that can down a UFO unless mods that modify this activity are installed.

In pirated versions of the game, this item does not appear and is instead replaced by the unpowered railgun