Triple Flail
Not unlocked yetEncounter the boss
Shocker Flail
Not unlocked yetKill 200 enemies
Spike Flail
Not unlocked yetKill 100 enemies in one game
Pulse Flail
Not unlocked yetDie 10 times
Flail Master
Not unlocked yetUnlock all special flails
Insane Mode
Not unlocked yetDefeat the boss
Skull Cracker
Not unlocked yetReach 100 kill combo
Skull Crusher
Not unlocked yetReach 300 kill combo
Skull Grinder
Not unlocked yetReach 500 kill combo
Easy Target
Not unlocked yetGet shot by an enemy bullet 10 times
Bones To Dust
Not unlocked yetDie 50 times
Head Hunter
Not unlocked yetDefeat the boss 5 times
Skull Massacrer
Not unlocked yetKill 5000 enemies
Pwned
Not unlocked yetDie fighting the boss
An Eye Closed
Not unlocked yetDefeat the boss in Insane Mode
History Repeats Itself
Not unlocked yetDefeat the boss in Round 2
Friendly Fire
Not unlocked yetKill 50 enemies in total with Explosive Skulls
Bullet Sponge
Not unlocked yetBlock 100 enemy bullets with Pulse Flail
Crowd Control
Not unlocked yetSlow 20 enemies at once with Pulse Flail
Overload
Not unlocked yetKill 20 enemies simultaneously with Shocker Flail's electric shock
Busy Doing Nothing
Not unlocked yet
Diehard
Not unlocked yet
The Truth Is Out There Somewhere
Not unlocked yet