Defeated 15 or more enemies in one song

Played 100 Music Stages

Obtained 10,000 Rhythmia

Cleared first series title

Activated abilities 500 times

Kill 1000 Infected

Survive a Horde

Craft an improvised weapon

Open the gates at the HERC checkpoint

Spend Knowledge points to max out a skill upgrade

Trigger a trap, with fatal consequences

Craft an item at a crafting station

Acquire a mutation