Successfully counter all of a Brute’s damage-giving attacks

Defeat 30 enemies with the Arm Micro

Make five enemies drop their grenade by shooting them

Defeat 20 enemies by blind-firing while in cover (without aiming with L1/R1)

Defeat 50 enemies with hand-to-hand combat

Find one treasure

Kill Daemon Prince Nemeroth.

Kill 75 enemies using Executions.

Get 250 Headshots.

Use the Invictus to destroy the Orbital Spire.

Fire the Psychic Scourge.

Kill 10 'Ard Boyz.