Gruntpocalypse

Gruntpocalypse is a Firefight gametype in Halo: Reach Firefight.

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 skulls will be activated during the match.

Trivia

 * In Halo: Reach, Gruntpocalypse is widely regarded as the best way to earn good amounts of cR over a relatively short period of time.