The weaponry introduced in Overdose is truly revolutionary - not in what they do, but just in what they are. The initial weapon is the Razor Cube, which is a cube made of metal blades that can be flung out at enemies. It then quickly returns back to you, which is nice in the event you find yourself out of ammo for the rest of the arsenal. Another gruesome addition to the weaponry is the Demon Head. This item is actually the head of the demon who was guarding the dungeon Belial is imprisoned in at the start of the game. How often do you get to walk around carrying a demon head with its tongue lolling out, let alone use it as a weapon? The BoneGun is equivalent to a shotgun, something no FPS would be complete without. What makes it unique however, is the fact that it shoots out high speed bone fragments as its primary fire and causes petrification of enemies as its secondary fire.
There is a crossbow, a rocket launcher, and a flintlock rifle - strangely out of place here - as well. Belial also gets to use a dagger filled with demonic power, known as a Shadow Blade. You don't stab with this weapon however, rather throwing it spinning into your enemies as the secondary fire. The primary fire of this weapon is fun though, as you send three spinning skulls out into the hordes to end their existence. Finally, you get to toss Demon Eggs at enemies or walls, where they stick until you detonate them using a left mouse click. The interesting part of this weapon however is that you can send out multiple eggs using the right mouse button, stacking them on a big boss-type so that you can take him out in one huge blow or clear the masses surrounding him.