Gruntpocalypse

Gruntpocalypse is a gametype in Halo: Reach Firefight where players kill oncoming waves of Grunts (Unggoy).

Overview
Gruntpocalypse is similar to the Bonus Round featured in Halo 3: ODST Firefight. Likewise, it involves a massive army of Unggoy of various ranks that will spawn continuously.

All load-outs consist of the DMR and M6 pistol for easy headshots. (hence the use of 'Grunt Birthday Party' skull.) A custom red skull is used during Gruntpocalypse which enhances sight and hearing of the Grunts to make the game a little harder.

Trivia

 * In Halo: Reach, Gruntpocalypse is regarded as one of the best way to earn a high amount of cR over a relatively short period of time.
 * Grunts in this mode are much less likely to run away when injured. However, they will still run if their leaders and allies fall beside them.
 * The game type is deceptively difficult on higher difficulties such as Heroic or Legendary.
 * Every Grunt squad usually has one Grunt with a Fuel Rod Gun or Plasma Launcher.
 * The most dangerous Grunts are the Grunt Heavies carrying Fuel Rod Guns, as they can kill you very quickly.
 * Unlike on other playlists, there are no Suicide Grunts, due to the fact that there are no "Leader" type units.
 * Using Armor Lock is highly recommended, as this can protect you from Grunt Heavies, plasma grenades, and Plasma Pistol overcharge shots.