Completed the mission "My First Gun"

Escape the Polar Sea.

Kill three enemies with one attack using the Blitzer.

Destroy 30 enemies while they're distracted by the Doppelbanger.

Fully upgrade one weapon.

Buy all of the weapons.

Use the Co-op overload to kill 60 enemies.

Kill eight enemies in eight seconds using the Darkstar Fission Tether with two or more teammates.

Kill 500 enemies.

Obtain all Ratchet & Clank 3: Up Your Arsenal trophies

Get all the Omega Weapons including the Rhynocerator

Attain All 30 Skill Points