Location not disclosed
Do a 6 kill combo
Quickly open 5 gifts consecutively
Reach half the Wave Mode
Defeat 6 waves in a row without dying
Kill 100 enemies
Kill an enemy right before it reaches you
Kill an enemy with your fist
Cut 4 limbs from your specimen.
Find all the ways to rip the specimen's jaw off.
Find all the ways to kill or incapacitate the specimen.