High Ground Holdout

The next large horde, and far more ferocious than the last. This mammoth army consists of a huge wave of Gargoyles, Devourers, followed by Agrons and Infested Marines, and ending with a zombie wave consisting mostly of Immortals. Now is the time to hunker down. It's nigh impossible to retreat or reposition during this stage, so be completely prepared. Sight is very important during this stage, it allows you to kill farther away. High ground is highly advised, as it puts that much more distance between you and most enemies. Recon Flares and Forward Observer Support flares are invaluable. Area of Effect skills such as Airstrike, Fire Mission, Counter Measures, and Burst Fire are necessary. When its all over, your squad will be low on ammo, energy, and allies, but hopefully still in one piece.