Tentacle
The Tentacle forms part of the Alien Plague infesting Mars' underbelly that you fight during the Red Faction: Armageddon Single Player Campaign.
Description
Like Monoliths, tentacles emerge from the ground often in support of alien ambushes or defensive actions. Unlike Monoliths, tentacles have no enhancing powers over nearby creatures, nor do they fire pulses of energy. Instead, tentacles use their tendril-like appendages to grab pieces of debris and throw them at you. A tentacle is also capable of occasionally charging up the debris so it explodes on contact. In this sense, tentacles exhibit remarkable strength, capable of heaving massive objects at devastating speeds, so never turn your back on these enemies.
Anticipate their trhows and dive out of the way or deploy a Shell. Heavy weapons like the Charge Launcher, Rocket Launcher or Plasma Cannon are they quickest way to take out tentacles. In a pinch, lighter weapons like the Assault Rifle and Nano Rifle can also get the job done.