Where the Wild Things Are
49 Achievements
12-15h
PS3
On Fire
Defeat 250 Fireflies
63.5%
How to unlock the On Fire achievement in Where the Wild Things Are - Definitive Guide
This will come as you play the game normally as you will have to kill 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.