The most violent creatures from darkness were arrested inside the Red Tower. An evil force capable of destroying it was discovered, putting all of mankind at risk. Shoot the monsters, upgrade your weapons, rise to more challenging levels, and destroy 'em all 'til not a single one is left!

The most violent creatures from darkness were arrested inside the Red Tower. An evil force capable of destroying it was discovered, putting all of mankind at risk. Shoot the monsters, upgrade your weapons, rise to more challenging levels, and destroy 'em all 'til not a single one is left!