In the first save room towards the left side of the back of the room.










In the kitchen on the corner cabinet.

At the corner store next to the bins in front of the garage.




















In Sams room.










After exiting room 201, enter the laundry room across to it and the possum will be on the bottom shelf where I'm aiming.

In the bedroom of the cabin where the dead deer is.










In the watermill on a shelf.










In the cave past the waterfall Unlocks after the piano puzzle behind bars next to the bolt cutters being guarded by two statue ladies. I accidentally got it while fighting them.

In the school section you will get to a pool and it is in the top left corner next to doors you need to go through to progress.










In the room where you get the Multigrade Developer, it is on the shelf in front of the door.










Enjoy the Possum Achievement and the Possum costume that's featured in the house screenshots!