The Storm (Level)

The Storm is the fourth campaign mission of Halo 3.

Upon completing it on the Normal, Heroic, or Legendary difficulties, the player will earn the "Assault" achievement and 30 Gamerpoints.

Background
It begins with a UNSC Warthog convoy moving to Voi, whose objective is to punch through the Covenant Loyalist anti-aircraft defenses that surround the Ark and allow Commander Miranda Keyes to pass through unscathed to the Ark. UNSC Marine forces, lead by SPARTAN-117 get involved in several pitched skirmishes as they must fight through the industrial zone of Voi, through warehouses and factories and having to survive ambushes by both Covenant foot soldiers and Covenant armor.

After breaking through the industrial area Master Chief met up with a brigade of Mongoose ATVs and commandeered one with a Marine riding shotgun using a M41 Rocket Launcher. They immediately engaged and destroyed a squadron of Wraith tanks but the victory was short lived as a Scarab arrived to crush the UNSC forces. After disabling it by boarding it then destroying its power core the UNSC forces prepared to push into a Brute controlled warehouse.

With reinforcements lead by The Arbiter and Sergeant Johnson along with volunteer civilians from a nearby factory, they pushed in, engaging nearly a dozen Brutes armed with Maulers and Brute Shots, a pair of Hunters and a Brute Chieftain wielding a Gravity Hammer. After that they pressed on to the AA site, engaging a small Covenant army defending it. Eventually they punch through, disabling the gun, allowing UNSC airforces, along with Miranda Keyes, free rein.