Kill all monsters in any monster-filled level on 'Hurt me plenty' or higher.

Get 3 multi-kills with the Shotgun.

Kill 2 enemies with a single barrel explosion.

Cause an enemy to kill another enemy.

Finish the game

Beat the Omega Weapon

Kill 1000 enemies

In public matches, perform a fast vault within 3 seconds of getting hit 15 times.

Unlock all of a demon's unique skills

Unlock Guardian Force Doomtrain

Unlock Guardian Force Bahamut

Find Ragnarok

Unlock Guardian Force Tonberry