Reanimal’s demo is live, and gives you access to a part of the nightmare in the opening chapters of the game. Here, you have The Boy and The Girl, the orphaned brother and sister, looking for their first missing friend, Hood. The demo gives you access to two main areas – the Mill and the Trainyard, where you’ll find three Masks to customize your hellish journey of survival. Here’s how you can easily find all three masks in the Reanimal demo.
Mask #1

The first Mask is found just after you meet Hood, your first missing friend, inside the Mill in Reanimal. Progress through the demo and you’ll eventually reach the interior of the Mill, notably after the tunnel section. Inside the Mill, you’ll find another blocked entrance to a tunnel on the far right, with Hood, one of The Boy and The Girl’s missing friend, sitting inside the tunnel. Interact with her, and she’ll ask you to leave while you can, warning you about her captor, Sniffer.

From Hood’s location, turn back and head to the far left of the area. You’ll notice a door on your left that leads outside of the Mill. Open the door, and head outside. There, you’ll find a crack in the wall. Squeeze through the crack, and you’ll find an open crate on your left. From this crate, you’ll obtain your first Mask in the Reanimal demo.
Mask #2

The next Mask is located inside a room accessed through a locker on the far right of the Mill, where you met Hood in Reanimal. From the first Mask, head back to the location of Hood, then take another right to find the rest of the Mill still unexplored. There, you have to pull some levers and make your way to the other side of the Mill, where you’ll notice a door with the lights on,

Use the levers to make your way towards the door, use each other to strategically create paths and progress from platform to platform to eventually reach the door, as marked on the picture before this one. Inside the door, you’ll find several lockers. Open the locker to the left of the locked one to get access to a bathroom. Inside the bathroom, head straight, and you’ll find the second Mask of the Reanimal demo below the sink.
Mask #3

The final Mask in Reanimal demo is located inside a door with no light in the Trainyard area, with the broken cart. Progress through the demo after you find the second Mask, and you’ll eventually exit the Mill through a tunnel, where you’ll find your friend, Hood, running outside. Once you reach outside, you’ll catch a glimpse of Sniffer walking ahead. Once the Sniffer is gone, follow the train tracks on the ground to reach the Trainyard area with the broken cart.

There will be three doors inside this area: two with lights on, and one with no lights. You need to access the one with no lights on, located on the right side, just beside the door with the lights on. Open the door, and walk straight to the next door inside the room. In the next room, you’ll find the third and final Mask in the Reanimal demo, below a table with a missile.
This brings us to the end of all three masks you can find in the Reanimal demo.

