This guide contains all of Penumbra's Puzzle solutions.
enjoy!

The First Puzzle!
This is probably the easiest one. But here we go:

Step 1: Take the coin out of the locker




Step 2: Put the coin into the vise, then twist the handle. When you've done that. Pick up the coin again.




Step 3: Use the coin on the ventilation shaft behind the shelf.




Succes!

Now, to solve this puzzle. You need to get a can of soda from the vending machine.

Step 1: Locate the vending machine


Step 2: Put a coin in the vending machine. You've still got the coin from the last puzzle.
Alternative Step 2: Throw a rock at the vending machine.

Step 3: Pick up the can.



Step 4: Use the can on the Thermostat to stop the hot gas in the ventilation shaft.



Succes!

Step 1: Locate some alcohol in the first room in the hallway.



Step 2: Walk to the end of the hallway and throw a rock at the Power Box



Step 3: Now try breaking the wire. This will open the last room in this hallway.



Step 4: Locate the syringe in the last room in the hallway.



Step 5: Use the alcohol on the syringe.



Step 6: Use the syringe on the body near the lasers.



Step 7: Use the syringe on the door lock.




Succes!

Step 1: Find a barrel



Step 2: Put the barrel in front of the power box & flip the switch



Step 3: Drag the burning barrel below a Smoke Detector.



Succes!


(The Computer Door code is: 1167)

Step 1: Locate a large metal stick



Step 2: Drag the metal stick to the gate, and open the gate with it.

Step 1: When you walk into the computer room. You will meet doctor Eminiss. A scientist who locked himself in his office. He will ask you for a saw. You can find this saw in the residential corridors. When you've obtained the saw, give it to Dr. Eminiss.



Step 2: He's now patrolling the area. He will usually walk back and forth between the room with the burnt computer cards and the Freezer. Let him walk in the freezer



Step 3: Lock him in the freezer.



Succes!

Easily the hardest puzzle in the entire game. (That's just my opinion)
I bet half of you came for this puzzle.
Here we go:

The Red Card is:


The Blue Card is:


The Green Card is:



(The Code to unlock the door with the Doorlock Controller.EXE program is: 3061

Step 1: Find & equip the wristband



Step 2: Find the locked locker. Break the glass by throwing something at it.



Step 3: Take the bottle containing: "Viscae Somnus" and combine it with your syringe.



Step 4: Inject yourself with the syringe.


Succes!

In the Kennels it's important you stay in the light. Do NOT venture forward in the darkness, without knowing what you're doing.
In the long hallway where it's possible for you to turn off the light, there are holes in the wall.
Beware of these holes because something lurks in the darkness.
Make sure to block all the holes with metal boxes to prevent it from catching you.

Now as you walk into this room, you will be trapped here with an Infected. This infected will slowly walk towards you. If he gets too close, just circle around him.



To kill him you have to turn the wheel that lifts an iron box.
When you've done that. Make sure the infected is directly under the iron box, and then flip the switch.

Now, when that tragedy is over, you can play some good ol' SCHMUP!
SCHMUP is a video game on Dr. Swanson's Computer.
The code for SCHMUP is: xor451



Have Fun!

After being chased into a room by two Infected.
Block the door behind you.
Now you'll have to look for a tube, it's on the ground near the computer.
Once you've got this tube, put it inside of the machine on the left side of the room



Now use the claw machine to pick up the crystal object and drop it in the hole.



After you've done that, pick up the tube again.
Now you'll have to turn the wheel on the right side of the room to open the door



And now run!

This is the examination room. In here you can find 6 chemicals. If you can't find them all. Do not worry! I've made pictures of all their locations.

1

2


3

4


5


6


Now when you've put in all of the chemicals. Insert the tube in the machine



After you've put in the tube and collected & mixed all of the chemicals, you'll have to press the buttons in a specific order.



as you can see, I've given every button a number. Now press them in this order: 2-1-6-4-5-3

Now these puzzles can only be solved in one way. If you solve them differently, you will be forced to redo them.

The First Puzzle: You'll find yourself locked in a room. Next to you is a wall with a loose brick.



Once you've removed this brick, someone will ask you to throw him that pipe in your room.
Do this and he will free both of you.



Succes!


The Second Puzzle: At the end of this level, there's a door with a switch nearby. Do not try to kill the infected wandering around. Try flipping the last switch in this area and then hide.

Succes!


The Third Puzzle: When you start this puzzle there's a pressure plate behind you.
Find a block and put it on this pressure plate.



After you've done that. A door will open. When you enter you'll see two things; A switch and another pressure plate. The first thing you should do is flip the switch



When you've flipped this switch, you must hurry back to the pressure plate you just put a block on. Drag the block into the room with the switch and put it on the pressure plate.

Well done! Now this may not be obvious, but you should kill yourself.
Run into the flames.



Succes!

Congratulations!

That were all of Penumbra's Puzzles!
I really hope you've enjoyed this guide!

Please leave some feedback. Did I miss any puzzles? Am I grammatically incorrect?
I'll be happy to edit any mistakes I made!