The Grunt is an alien from the game, Halo. They are small, semi-squeaky voiced aliens part of the Covanent, an Alien alliance bent on destruction. They cannot breathe in oxygen like humans can, so they have fin-like breathing tanks on their backs so they can breathe on earth. In the games you can hit the tank off while they are alive or dead. Oddly enough, if you hit it off while they are alive, they will still run around and will not die. There is an unlockable called Birthday Candle. If you turn the unlockable, or Skull on, confetti and the sound of children yelling "Yay!" when you get a headshot on a Grunt.
Anatomy
The grunt is a sharp toothed alien. The Prophets made them air tanks and mouth pieces for them. The air tanks come in different colors such as red.
Weapons
Like any other alien is Halo, grunts carry weapons. They are:
Plasma Pistol
They fire small, plasma balls that can stun a vehicle if fully charged.
Needler
These weapons fire pink crystals at their foes that explode after awhile.
Fuel-Rod Gun
This is a heavy gun that fires a large plasma battery. They can do a large amount of damage. The batterys are similar to the plasma pulse of a Wraith, but smaller.
Plasma or Sticky Grenade
These grenades are special because they stick to anything besides some Brute Cheiftains, and Jackals Shield's. They make a loud, Beeping noise; then explode.
Ghost
Grunts often use Ghosts to move around at high speed. They can shoot a few plasma balls and they can boost, thus splattering the enemy.