The Painkiller's blades do twice the damage.
The Painkiller's beam stays active even without looking straight at the headpiece.
The Shotgun's spread is reduced four times and the range is increased by 50%.
The Shotgun's freezer lasts twice as long.
Stakes ignite almost instantly when fired ("95% sooner") and fly 60% faster and absolutely straight.
Grenades set fire to the area where they explode, which lasts a few seconds.
Rockets fly 50% faster.
The Minigun does 50% more damage and knocks back enemies 50% harder.
Shurikens always explode.
The ElectroDriver's bolt arcs over to enemies close to the targeted one.
The SMG fires in full auto mode.
The Flamethrower's flames become larger by 25%.
Bolts fly 20% faster and do 50% more damage.
All Heaterbombs explode on impact.
Weapon modifier
The weapon modifier powerup can be found in only a few levels. It changes the behaviour of each of the weapons in an unique way, though always beneficially. Here are its exact effects.

