Behemoth
The Behemoth forms part of the Alien Plague infesting Mars' underbelly that you fight during the Red Faction: Armageddon Single Player Campaign.
Description
Behemoths are massive creatures covered in thick armour, resistant to most weaponry. Although behemoths move at relatively slow speeds, they are capable of charging forward, smashing through anything in their way, so don't think you'll be safe hiding behind a building or any object. Instead, its best to keep moving while engaging these beasts, circling and diving out of their way. In addition to their charging attacks, behemoths also spit a toxic liquid that creates a small toxic cloud on impact. However, if you keep moving, you're unlikely to be hit by these projectile attacks.
While circling and diving, constantly fire at the behemoth with the heaviest weapons you have. The Rocket Launcher, Plasma Cannon and Singularity Cannon are all very effective, but it takes multiple direct hits to bring down a behemoth. If you've upgraded Berserk with the Berserk Pulse upgrade, the Nano Rifle can make a serious dent in the behemoths health. If you need to take a break from moving, or if the area doesn't allow for evasive movement, deploy a Shell and hold steady while blasting the behemoth. The Shell won't last long enough to kill a behemoth, however, regardless of which weapon you use. Be ready to move once the Shell expires.