Chapter 1
Skulls
1: By the rocks under the hanging man outside
2: On the left side of the green lockers as soon as you walk into the tavern
3: On the left side of some boxes in the 'attic' after going through the 'office'
4: In the corner by the hanging man after leaving the 'blood puddle' room
5: In the shed outside after you get the crowbar
6: On the right side of the bed in room 3
7: In the shower room in room 15, break the lock on the door
8: In the area where you turn the orange wheel to open a gate, on the back side by the green lockers
9: On a shelf beside one of the four switches needed to open the door to the boss
10: After opening the door leading to the boss, turn left and check the left side of the boxes with supplies on them
11: Continue onward and then open the blue door. Climb through the hole in the wall and look behind the fence. Shoot the lock on the door, then go back and look door 14. Open it and look on the desk
12: In the boss room, before or after taking on the boss, look for a ladder on one of the pillars. Climb it and reach the skull on the other side of the room

Essences
1: Walk towards the baby in room 1
2: Interact with the pick-axe a few times in the 'danger high voltage' room, opposite of room 6
3: Get the crowbar and go through room 4, stare at one of the pictures on the wall and find the one with the children with bloody eyes. It can't be broken with the crowbar unlike the others
4: Go into the kitchen in room 11 and turn on all the red knobs on the stove
5: Once you get enough ammunition, go back outside in front of the tavern and look towards the back crane. Shoot down all four of the birds


Chapter 2
Skulls
1: Right by the cargo container with the screamer once you walk into the warehouse
2: Between the second and third turbine on the right after the room where you get the Gravity Gun
3: In the storage room, in the corner behind door 6
4: While you crawl through the tunnel in the sewer with the help of another player, check the left side of the tunnel when you reach the planks the wood that'll be destroyed by the second screamer in the tunnel
5: After climbing through the tunnel in the sewer, look under the bridge
6: In the security office after the poison zombie
7: In Loading Dock 2A, check the room that has the office door key, and look behind a pair of crates on the floor near the blue truck
8: Open the offices door, climbs the stairs, and after the door with the vending machine beside it, open the next door on the left and check the right 'closet'
9: From there, walk down the hallway and open the next door on the right. Look for a spot on the wall with bricks on it and break it
10: After getting the gas and opening the gate to the crane area outside, head towards the left-most crane and jump across some planks on the left to get around the door.
11: Climb on top of the dumpster by the white van and walk across the roof until you see the skull in the corner
12: In Bob's Apartment, check the corner of the room with the 'bleeding box'
13: After going through the apartment and jumping down the elevator shaft, check the corner of the room you fell into before heading into the mines
14: After getting the key from the shed, don't go back yet; keep going down the path until you reach the 'corpse' with the supplies. You'll see the skull before you reach the corpse
15: Go into the next part of the mines and go down the path on the right until you reach the other side of the fence. Take the supplies and then turn around to find the skull
16: Leave the mines and climb all the stairs. When you reach the top, look left and climb onto the beam to reach the skull
17: When you reach the neighborhood, check the left side of the logs