The Anti-Plasma Cannon is a new weapon added in Planet Strike. It is a large double-barreled weapon that fires powerful bursts of energy capable of destroying doors, except those that are locked and "one-way" doors. It is the most powerful weapon available, easily and quickly defeating nearly every enemy, but should be used sparingly due to the amount of ammo it uses. This weapons attack will go through enemies, doors and will not stop until it hits a wall or locked door/one way door. Like the Plasma Discharge Unit, its impact causes splash damage.
The weapon this most closely resembles from Wolfenstein 3D and its various mods/ports is the Rocket Launcher. Both weapons travel through enemies and cause splash damage upon detonation on solid objects. They are extremely rare and considered each games ultimate weapon.