Hey,

Besides all the secret areas, I'll also mention if there are any notable items you don't want to miss, like an Extra Life or Permanent Health increase.

Some secrets were a bit harder to explain because the maps are large or lack clear landmarks, but with the help of screenshots, it shouldn't be too difficult to find everything. Let me know if anything needs clarification.

> 1. Kick down the first wooden barrier, there is a switch on the right, which opens a wall on the opposite side. (1 Extra Life)



> 2. Jump down the hole, crawl under some furniture, go out of this room, there will be a door blocked by wooden planks in front of you.

Break it down. On the far end of this room, on the left side, there is a switch.

Exit this room and head left in a now opened room.



> 3. Progress until you reach the room with the red button. The swastika painting on the right side hides a secret.



> 4. Progress until you reach the room that has a submachine gun at the entrance.

Go on the right side until you reach the far end of this room. Bump into this wall to open it. (Permanent +5 Health)

> 1. As soon as you exit the starting corridor, there is a door on your left that's blocked by wooden planks.

Enter that room, shoot the red barrel at the other end of it to remove a painting that's hiding a secret.



> 2. To progress you have to break the wooden planks on this door.

Enter the room. In the middle of the right side wall is a room, enter it. At the other side of it is a switch that opens a wall close by. (1 Extra Life)



> 3. You will arrive at this locked gate.

Turn left, go a bit farther, then turn right and bump into the wall next to some cages.



> 4. You will arrive at a table on which there are mouse traps with a rat in one of them. Look to your left, there is a wall with a small gap close to the floor. Bump into that wall to open it. (Shotgun)



> 5. Before you head through these iron gates, bump into the wall on the right side.

> 1. From the starting area, hug the left wall until you arrive at the area with 'Achtung' signs at the entrance.

Head inside the 'Achtung' area. On the left side there is a switch which lowers the platform next to you.

Go on that platform to press the red button. It opens a wall that you can see through the window behind you.

Go in that now opened area. Keep going on the right side until you see a wall with different texture- bump into it. (Godlike Flashlight)



> 2. In the room that has the red key, there is a switch on the first right side pillar. It opens a wall nearby. (1 Extra Life; a new blue-white skeleton will attack you when you pick it up; oh, right, there also is a big dude dancing!)



> 3. From the starting area, hug the right side wall until you reach the checkpoint star. Head in that small area behind the star. There is a switch on a wall which lowers the pillar next to you. (Bazooka)

> 1. From the starting point, head straight in the wall in front. The wall has no collision, and there are three more walls that will open when you bump into them. (1 Extra Life, "Swim, Swim, Hungry" Achievement)



> 2. After you use the switch behind some boxes, head up the first slope. In the corner of that small area is a well hidden narrow path.

Go down there, kill the enemies, then pick up the bazooka. Four more enemies will come out- kill them too. In one of the corners is a well hidden switch. It opens a wall nearby. (Permanent +5 Health)



> 3. As soon as you enter the boss room, go right. There is a hidden narrow path next to the 'electric device'. (Godlike Flashlight)

Boss can be killed much safer from up here.



> 4. At one point you will go up some winding stairs. You will arrive in a room with many barrels. There is a switch towards the other end of this room.

It opens the door not far behind you that was previously locked. (Permanent +5 Health, Bazooka)

> Not a secret, but there is 1 Extra Life inside the cell 2C that you can't access at first.

You have to come back for it later. The gates will blow off, some enemies will run out and you'll be able to pick it up.


> 1. You will come to a place that has electricity running on the floor.

Shoot the wooden barriers. You can run through the electricity; on the hardest difficulty you will lose only 10 or so health points. If you wanna save every health point, then come back for this secret later when you have turned on the generators- electricity won't be here anymore. (Permanent +5 Health, Bazooka)


> 2. On the opposite side of the electricity are several wooden barriers that you have to break to progress.

Check the right side wall between the barriers, there is a switch which opens a wall behind you. (Godlike Flashlight)



> 3. Inside the previous secret room, bump into the wall in front of you. (Shadow Warrior homage area)



> 4. You will come to this area.

Head down the first stairs, turn right. Go forward, then through the gate, then turn left.

Go in the door that's on the right side of the swastika flag. In that room on the other side is a Ouija board.

Interact with it; wait for the... ritual to end. A hole in a wall will open and an annoying bat will attack you. You'll get the secret when you collect the gold from the hole in the wall.


> 5. Eventually you will activate a switch that opens the door that leads towards the level exit.

Go through the door and to the right. Before you go up the stairs to finish the level, check on the left side- there is a passage that you can crawl in.

> 1. From the starting point, go through the first two doors, then turn right. There is a switch next to a candle.

It opens a previously locked door that you passed by on the way here.



> 2. You will arrive at these stairs.

Go up and keep going along the right side wall. There will be two bathroom, then a bedroom, then one locked door (keep this door in mind for the upcoming secret!). Go through the next door- there is a switch in the corner behind some boxes which opens a wall in the same room.



> 3. In the previous secret room, there is a bright yellow painting. Go close to in and interact with it. That will unlock the door you passed by earlier (the door I mentioned to keep in mind on the way to the previous secret). (1 Extra Life)



> 4. To progress you will have to go through either of these two doors. Go in the left side door.

There is a piano, interact with it. That will open a secret crawlspace in the same room. (1 Extra Life)



> 5. Eventually you will arrive here.

Go left, and in the next room. There are some breakable boxes which hide a crawlspace. (Permanent +5 Health)

> 1. At some point you will arrive at this building.

Head inside and go left to the edge. Look down, there's a ledge that you can fall on. (1 Extra Life)



> 2. You will arrive at this corridor (keep in mind the fireplace on the other end on the corridor).

Go in the first opening to your right, navigate through the bookshelf maze. At the end of it there is a switch.

It opens a crawlspace next to the fireplace I mentioned earlier.



> 3. You will go past a big statue, and arrive at a place where the light is turning on and off and making electric sparks. On the right side there is a breakable wooden barrier.

Break it down. Outside on your right is a red button, that opens the locked door in the room that you just came out of. (Permanent +5 Health)

> 1. Close to the other end of the huge corridor, on the right side wall, there is a red button that opens a door close to it.

Go through that door and crawl through the passage that leads to a large secret area ("Aardwolf" achievement); it even has the second secret inside it. And make sure to enter this room because there is Permanent +5 Health inside.



> 2. This secret is inside the previous secret area. As soon as you crawl through the passage, keep going along the left side wall. Eventually you will arrive at two breakable armored figures. Bump into a wall behind them to open it. (2 Extra Lives)



> 3. To progress you will go up these stairs.

Keep going along the right side wall. You will arrive in a bathroom. Break the boxes in the corner to access a crawlspace. (1 Extra Life)



> Not a secret, but there is Permanent +5 Health close to the entrance of the bathroom you just were in. It's directly in front of the bathroom door, just go around the wall. You can also easily find it by going to where the radio music is coming from.

> 1. Exit the air tram. As you go down the stairs you will see a wooden box in front of you.

Smash it, go over the wooden planks, the secret is just a little farther. (1 Extra Life)


> Not a secret, but there is a missable Permanent +5 Health pickup. After you cross this wooden bridge, go left, then inside the small building.



> To progress, you will have to speak to a nazi soldier. Make sure to pick 'Spare this nazi scum'. If you kill him, you can not access the sixth secret.



> 2. After you go down the elevator and open the door that requires the blue key, you will have to use this switch to progress.

Go down the stairs on your right. There is another switch hidden in the corner.

Go back up the stairs you just came down. The hidden switch opened the door on the opposite side.



> 3. After you cross the frozen water area, you will arrive here.

Before you go up these stairs, go down on this small frozen water area and crawl under the stairs. (1 Extra Life)


> 4. Now go up those stairs, then up the slope to the right. Turn left and go through the building. Then over the wooden bridge, and turn left.

Go in the building, then up the stairs and look behind you- you will see rockets and crossbow arrows.

Go along the railing, collect the ammo if you need it and drop down 'one floor'. There is a well hidden switch.

Now drop down, go again across the wooden bridge, and back in the building. There is now an open wall to your left.



> 5. You will arrive at his building.

Go in and go up three flights of stairs. Check in the corner next to the stairs, you will find a wooden box that hides a red button.

Go back down. There is now an open area next to the entrance of this building. (Permanent +5 Health)



> 6. After crossing the walkway alongside the dam, you will arrive at the door that requires the red key. If you chose to spare the nazi's life earlier, then the door at the other end is unlocked. (Permanent +5 Health)

> 1. Go in the very first building that's on the right side. Go out through the other door, there will be an oil pump.

You can go behind it, close to the wall. Push the red button, which then blows a hole in the wall next to it. Go through the hole and crawl in a tight passage.



> Not a secret, but this let's you backtrack, and makes it easier to explain where to find the upcoming secrets. So, progress until you arrive at the closed yellow gate with a car in front of it.

Proceed on the right side up the hill, and go in the first building on the left.

In that building is a red button that opens the yellow gate you just passed by.


> Not a secret, but there is a missable Permanent +5 Health pickup. Go back down the hill and through the gate that you just opened. Go through the first door on the left.

Now go along the right side wall. You will go past some posters on the wall- keep this spot in mind for the upcoming secret.

Then down the small stairs and you'll find Permanent +5 Health between the cars.



> 2. Go back up the small stairs you just came down, and keep going along the right side wall until you arrive in a small room with some wooden boxes in the corner.

Break the boxes and you'll find a hidden switch in the corner. It opens the wall where those posters are that you passed by a minute ago.



> Not a secret, but this Extra Life can be easily missed. Just after you unlock the door that requires the red and the blue keys, there is 1 Extra Life in front of you, between the flags.



> 3. As you proceed just a bit farther, there will be a bathroom in front of you. Go inside and find a breakable gray box on the right side.

Crawl through the passage to arrive in a secret area where you can listen to and watch two songs by Coure.



> 4. After meeting the weed smoking time traveler, you will arrive in this hallway. Bump in the wall on the left side between the last 2nd and 3rd flags. (Permanent +5 Health)



> Not a secret, but after you kill the boss, you might wanna grab that 1 Extra Life at the other end of the boss area, which was earlier behind an electric force field.

> 1. This gate will open when you go near it. Before you go through it in the big open area, break the boxes on the left side to find the secret.



> Not a secret, but there’s 1 Extra Life in the middle of the big open area. You’d have to really try to miss this one, but I thought I’d mention it anyway.



> 2. After some time, you’ll pass this water area.

And soon after you'll arrive at these stairs on the right side.

Go up these stairs, then forward until you come to the building with the big cat statue on the roof.

Go on the right side of that building and look to your right. You will see a wooden bridge close to a checkpoint star. Go over the bridge and in the teleporter.



> 3. After you've picked up the red key, find where the blue key is, and look down in front of you, a bit to the left. You will see there is a locked gate. It requires the red key.

Go down, go through the gate and into the teleporter. You will be teleported on a ledge; make sure to grab the 1 Extra Life at the other end of it.

> 1. Eventually you will go through a narrow brown passage. When you go out of it in the first open area, there will be two torches close to each other in front of you. Interact with the one that's not lit to open a secret passage. (1 Extra Life)



> After the loading screen, you will be in a new map. This is not a secret, but it opens a shortcut with some treasures, makes it a bit easier to explain where the next secrets are, and you will get Permanent +5 Health too. So, progress until you find the red key. Look behind you- outside of this room there are some stairs with a switch underneath.

It opens the shortcut next to where the red key was.

Go through the shortcut you just opened and look to your right.
Go forward until you are at the lava, then turn left. You will see some treasure in front of you, and a bit farther you will find Permanent +5 Health.



> 2. Go back to where you came out of the shortcut a minute ago, and look to the left this time.

Go straight forward. When you are at a building, turn right.

You will find some lava there, and in the corner is a teleporter- step in it. (1 Extra Life)



> Not a secret, but there is another Extra Life that can be easily missed. After you pick up the Extra Life on the roof in the previous secret, look to your right, farther down. You will see an Extra Life under some stairs.



> Not a secret, but this Permanent +5 Health pickup is well hidden. Later, after you've pressed the button on the second device, you'll have to go up these stairs that were previously blocked.

Go straight forward until you are at the lava, then turn left. You will see some beers. Go past them and you'll find Permanent +5 Health.

> Not a secret, but before you go down the elevator, make sure to pick up the Extra Life behind some boxes, it might come in handy.

If you have any questions, suggestions, criticisms, found any mistakes and so on, please let me know!

Thanks to the developers for making a good game and thank you for checking out my guide!