Gut 3 Centaur Generals

Kill the Poseidon Princess

Kill Hermes and acquire his Boots

Cover Kratos in 500 buckets of blood by killing the enemies

Kill Hades

Upgrade any weapon to the next level

Kill Poseidon

When staring into the face of adversity, show courage and persevere.

Radio in a naval bombardment that kills at least 4 Japanese soldiers.

Complete 'Semper Fi' on any difficulty. (Solo only)

Kill 3 aliens at once

Shoot down 20 alien fighters

Kill 50 aliens