The Behemoth is the sword used by Matt Miller and Playa in the mission "http://deckers.die". It is not normally available outside of the mission.
The primary attack of this weapon is a simple swipe, while the secondary attack is a ground slam shock wave. In the mission while this weapon is equipped, the Sprint button dashes, and the Grenade control breathes fire.
Primary attack swings sword in the direction Playa is facing. The Secondary attack is towards directed towards the cursor, regardless of which way Playa is facing.
Trivia[]
There is no normal cheat for this weapon, but it can be added to the cheats file, but the model is not loaded normally and does not work outside of the mission.[1]