Navigate the Sky Bridge on Mission 16 without hitting the lasers

Complete a mission with a SSS rank

Spend 10,000 Red Orbs

Acquire Aquila

Free half of the Lost Souls

Help Phineas retrieve his eye

Complete the MP Training in Olympus

Destroy all enemies on vehicles during the prison break.

In Dead Ops Arcade, use a Speed Boost to blast through 20 or more enemies at one time.

Reach the end of the descent on Mission 6 having killed all of the enemies

Acquire the Angel Boost ability

Acquire Osiris

Acquire Arbiter