Solve the Three Judges

Save Pandora

Acquire the Boreas Icestorm

Kill Cronos

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

Fight 30 opponents via Arcade Fight Request. It'd be easy with the right bait, he he.

Fighting is fun, huh? Well then, let's aim for 300 matches online fought, OK buddy?