Where the Wild Things Are
49 Achievements
12-15h
PS3
The Cleaner
Defeat 100 Shadow Creatures
53.2%
How to unlock the The Cleaner achievement in Where the Wild Things Are - Definitive Guide
Jakeythedude
TrueAchievements
TrueAchievements
These are the spider-like sludge monsters. They are found in most of the levels, especially later on in the story. You will almost definitely get this through natural progression in the story. I highly doubt you can avoid getting this one.
OnceFallen
This will come as you play the game normally as you will have to kill way more than that just to get through everything. If for some strange reason you do not get this by the end of the game, just reload any chapter and find a firefly nest where they will respawn from after you kill them.