Sever 50 enemy limbs using weapons or skills

Kill 100 enemies using environmental hazards

Kill 5 enemies while they are conducting a Call for Reinforcements

Eliminate the Daemonhost and restore vox communication

Kill the Hive Tyrant

Defeated Corrupter.

Deploy a bomb in the promethium well to destroy the Tyranid swarm

Defeated Abaddon.

Defeat the Lord of Change and face a figure from the past

As Peni Parker, blast 3 enemies with a single use of Arachno-Mine.

Hear all of the Chaplain's dialogues

Land a 3-player KO streak.