Halo MCC Custom Maps - Alphamoon Quarantine Zone

Jim navigates the no mans land that is the quarantine zone, unexpectedly finding resistance from the heretics!
Storyline -
The Heretic Leader has fled the gas mine to his compound on Basis so it's up to the Arbiter and Rtas' crack team of Covenant commandos to suppress the truth like any real followers of the Great Journey should. The Heretics are heavily dug-in here and heavy resistance is expected. Thankfully, their anti-air accidentally shot down a nearby Sentinel Factory when the Covenant were making landfall, so now the Sentinels want everyone dead instead of just you and your own.