If you don't want to use the default controls, you can choose the controls you want before you play the game.

To do this, run the game, and click on the "Input" tab in the Configuration box, and then change your controls there.

Otherwise, you can just stick with the default controls.

(If this guide is useful to you, then please rate it upwards.)

UPDATE, 8 Feb. 2021: The game no longer loads from the Configuration box, so it seems that there is no longer access to that option.

At the start of the game, choose a weapon by using your mouse wheel.
Alternatively, press 2 for a pistol or 3 for a sub-machine gun.

I recommend the SMG; it's a bit "spray and pray", but - as far as I can tell - you have unlimited ammunition (just remember to reload - as you don't want to start a fight against 6 soldiers when you only have 2 bullets left in your magazine).

You need to collect all of the posters to get 5 of the 7 achievements; you'll get the final 2 achievements when you kill Hitler and go into the church.

When fighting the soldiers, if your health gets low, back off from your enemies, and let your health recharge to full again (your health bar recharges quite quickly).

Be careful when fighting, as if you die you'll have to start all over again (with zero posters).

To start, just jump out from the cave (which you spawned in).

From the spawn cave, go straight ahead.

Go over the hill, whereupon you'll see three houses.

Get the 3 black cat posters (on the side of one of the houses).


Notes: Press "E" to grab a poster from a wall.
Get all of the posters, as you will need 14/14 to fight the Hitler boss.

There are 3 of each poster type - except at the barn, where there are only 2.

If you head right from the spawn cave you will be going to the barn; however, I prefer to get all of the posters by heading left.

Head directly left from the "Hallelujah" achievement (the black cat posters).

You'll see some more buildings.

Get the 3 white-haired warrior posters (on the sides of one of the houses - 1 on one wall, 2 on another wall).

UPDATE:
The Kermit posters have been replaced with the white-haired warrior posters.
(Thanks to player "Jackass" for the information that the Kermit posters and Hitler-Shrek posters had been replaced.)

Head left from the "UFO" achievement (the Kermit posters).

You'll see some more buildings.

Get the 3 White Cat posters (on the side of one of the houses).

Keep circling left around the map (actually, from the White Cat posters, you would be pretty much be going straight ahead).

Run past the church until you get to the big barn (there's no point in doing any fighting at the church until you get the posters from all of the other places).

At the barn, get the 2 black man posters (on the front of the barn).

Go back to the church.

Get the 1st ginger cat poster, located inside the outdoor toilet, which is to the right of the church (press E to open the toilet door).



Get the 2nd and 3rd ginger cat posters (on the side of the building to the left of the church).




UPDATE:
The Hitler-Shrek posters have been replaced with the ginger cat posters.





Note: You must collect all of the posters (14/14) so that you can fight Hitler.

Once you have all of the posters (14 of them), kill all of the soldiers outside of the church (so they don't shoot you in the back whilst you're fighting Hitler).

Go to the front of the church and shoot Hitler (who is inside).

Note: The first time I fought Hitler, I went inside the church to do so, and died very quickly - so I suggest you shoot him from the outside doorway.

I went for headshots, on the assumption that those shots would do greater damage.

For me, both the "Omae wa mou shindeiru" and "Death Boss" achievements triggered at the same time when I went inside the church after killing Hitler.

However, apparently, there is a difference between the two achievements - as (at this stage) 50% of players have earned the "Death Boss" achievement, but only 47% have the "Omae wa mou shindeiru" achievement.

My guess is that the "Omae wa mou shindeiru" achievement is awarded for going inside the church.

UPDATE:
You do get the "Omae wa mou shindeiru" achievement when you go inside the church. This was confirmed by player "Dutch Trade Winds 420", who got it when he went inside the church, but who was killed by Hitler (so he didn't get the "Death Boss" achievement at that time).

As an aside, you can go up the church stairs - to the right in the front alcove of the church - which will take you to the church organ.



Also, from inside the main part of the church, you can go up some stairs to get to the top of the bell tower.


However, there is no need to climb either set of stairs - only do so if you are curious about the map.

1) Please get rid of the stupid noise being sung on the start screen.
Presumably it's meant to be both annoying and funny, but it's only annoying (actually it's high-pitched, out of tune, and highly annoying).

2) I would suggest that the game be configured so that players start with a SMG already equipped (when I first started, I was wondering how to get a gun, and I can see from the Steam discussions that I wasn't the only one with this problem).

3) Please, please, please, put in an on/off button, or a volume slider, so that the background music can be turned off, or at least turned down - it's quite annoying to be spammed with the same music repeating throughout the game (you can barely hear the gunfire, let alone any other in-game sounds).

UPDATE:
As the developer has updated the game (changed two of the posters), but hasn't fixed the audio, it appears that he wants the audio to be annoying. No idea why, but it is what it is.