10 Unique Weapons That Only Exist In One Game

7. Scarab Gun - Halo 2

The most powerful weapon Halo has ever seen, the Scarab gun was a welcome Easter egg in the second game (and its subsequent remaster). Essentially, this was a plasma rifle that you could duel wield - but one which fired the same rounds used by the hulking Scarab fortresses.

It's not easy to find, but once you have this equipped, you will become unstoppable. There's no danger of it overheating, and the damage this thing puts out is unparalleled, even compared to the other super weapons in the series.

The only thing you have to worry about (other than not getting stuck in the impossible location it's hiding) is hurting yourself with the splash damage. Get too reckless and you'll no doubt take yourself down with everyone else around you.

This is a weapon not meant for human hands.