Deleted Weapons

The Machete was a melee weapon like a sword.

The Gravity Rifle was going to be the Covenant Sniper Rifle of Halo: Combat Evolved, but Bungie decided to delete this weapon much like they deleted the Engineer. They do have the model in game but they never made a proper texture, first person model, and projectile. However a common mod simply has it firing plasma grenades which seems to be the right idea for a supposedly powerful weapon, similar to a Fuel Rod Gun. The Gravity Rifle was remade for Halo 2 as the Beam Rifle, which was also in Halo 3.

The Gravity Wrench was a deleted Covenant weapon intended for an early version of Halo: Combat Evolved. It may have provided a titular basis for the Gravity Hammer. It may have also inspired the Plasma Pistol, as the weapon must charge and then fires a strong ball of energy. In addition to that, it appears to be act like a flamethrower, or other Support Weapons.