Kill 6 enemies in one use of Shockwave.

Destroy 100 Pods while piloting the Mantis.

Safely escort Winters through the depths.

Find out how to reach the lair.

Kill 100 enemies while in the Marauder Scout Walker.

Destroy the Jamming Devices.

Make it to the surface.

Perform melee finishers on 25 Creepers (single player only).

Destroy the Water Filtration Plant.

Kill a Wraith before it re-stealths.

Kill 2 other enemies with a single exploding Berserker.

Fire an enemy into another enemy with the Magnet Gun.

Remove the Seal.