Okay, so to put it shortly, the lack of a proper guide for this game was annoying me a lot. There is nothing at all online. Only 2-3 useful posts on the discussion part of this community, otherwise all the youtube guide are outdated. Seeing how annoying it was to get curtain achievements that had picky requirements, i decided to at least start off with a proper achievement guide for this game, so you won't need to spend an extra 20 in-game hours trying to figure out how to do certain achievements like i had to do. In the future i might stop being lazy and make actual videos on how to do super fast perfect runs for the base game & DLC so you can do them both under 30 minutes. But for now i remain lazy. Enjoy this guide and if it helped you out, leave me a comment, i'd appreciate that a lot! :)

• 
  Chapter I
  Complete the first chapter.
  
  
• 
  Chapter II
  Complete the second chapter.
  
  
• 
  The Ferryman
  You encounter hum during chapter 3 after escaping the underground bunker. Cannot be missed.
  
  
• 
  Chapter III
  Complete chapter III. To do this you can't go into the void (Glowing eye), nor the nightmare chapter (Air Vent). You need to do the good or bad ending by going up the stairs and heading towards the front door, where the police waits on the other side. On most difficulties, to get the good ending you need to beat the game without dying and for some difficulties you can die one to two times, but i am not sure which difficulties. To get the bad ending, you need to get to the gate, but having died more than two times.
  
  
• 
  Finally Free!
  Do the good ending. (Chapter three staircase without dying)
  
  
• 
  Not again!
  Do the bad ending. (Chapter three staircase after dying too many times)
  
  
• 
  Cool!, souvenirs!
  Do the good ending while holding a candle when you reach the front gate.
  
  
• 
  Can we keep him?
  Do the good ending while holding the rat when you reach the front gate.
  
  
• 
  I'm just a boy with a flashlight
  Complete the game without dying.
  
  
• 
  Fearless
  Complete the game on Fearless with the good ending. Before starting your run, you'll need to go into the setting and manually set your gamma to zero. Despite the Fearless difficulty lowering the maximum gamma, the achievement is glitched out and you'll still need to manually lower your gamma to the minimum. Then you can start a new game on Fearless difficulty without touching your gamma during the whole run.
  
  
• 
  You are Hardcore!
  Beat the game on the hardcore difficulty.
  
  
• 
  What is that thing?
  Upon entering the void chapter there will be a witch doctor/spider hybrid that will be your guide through the darkness. Upon seeing him you'll get the achievement. To get to the void chapter, you need to play the game without the flashlight and by dying less than six times.. Personally i use the Fearless difficulty for this one. During chapter 3, after the ferryman you'll go up the stairs and on the alter there will be a glowing eye particles thingy. Stand on it for a while and it'll bring you to the void chapter.
  
  
• 
  The Void thing
  After the guide brings you to the end of the level you'll meet an entity and the achievement will pop-up.
  
  
• 
  Chapter : The Void
  Complete the void chapter. To get the void ending, you need to play the game without the flashlight and by dying less than six times. Personally i use the Fearless difficulty for this one. During chapter 3, after the ferryman you'll go up the stairs and on the alter there will be a glowing eye particles thingy. Stand on it for a while and it'll bring you to the void chapter.
  
  
• 
  Chapter : Unknown
  Complete the Unknown chapter. Basically in chapter 3 you need to head into the vent to get to the extra chapter and get the nightmare ending.
  
  
• 
  HEE HEE !
  Launch the game at 3:00 AM.
  
  
• 
  You are a snacc!
  Have the Ayuwoki kill you.
  
  
• 
  NOPE.
  Quit the game before leaving the first room.
  
  
• 
  Gonna play or what?
  Stay AFK in the main menu for over ten minutes.
  
  
• 
  Moonwalker!
  Put a weight on your ''S'' key or a rubber band on your steam deck and put your back to a corner for 30 minutes.
  
  
• 
  One Hour!
  Play the game for an hour.
  
  
• 
  Two Hours!
  Play the game for two hoursé
  
  
• 
  Three hours!
  Play the game for three hours.
  
  
• 
  Five Hours!
  Play the game for five hours.
  
  
• 
  Ten hours!
  Play the game for ten hours.
  

• 
  Lore Enthusiast
  Listen to all the tapes. They are extremely easy to find. I'll try to update the guide to show the locations very soon.
  
  
• 
  The Collector!
  Find all the Ayuwoki statues.
  This has got to be the most annoying achievement and i'm still not 100% sure how the spawns work. I'll also include the locations i found at the end, because yes... they are random. Also when you die during a chapter, you have to recollect all of them again... big yikes.
  So the way i got the achievement : I had found 2 statues in the chapter one., but then i died. After restarting chapter one, this time i got 3 statues! Which surprised me, because usually i can only find two. Then when i got to the second level i found 2 more and the achievement popped up. So i think, I THINK you need to collect 5 statues. And there is a possibility that if you didn't get the achievement during the second chapter that they will spawn more statues in the third chapter and the nightmare chapter. (When you head into the vent) So what i would recommend is restarting the first chapter till you get good RNG and manage to find 3 statues in the first chapter. Don't forget that in the first chapter there is also a possibility that there will be a statue that will spawn in the bedroom that's on fire. ( You get there by using the key you obtain after completing the door puzzle)
  So here's the spawn list i spent a while making... and it's probably not complete, so if you know any spawns that aren't there, let me know in the comments and i'll add them! :)
  
  
  Statues spawn Locations :
  Chapter one :
  Near the vent of the DLC.
  In the room that has a table, behind the door.
  Behind the boxes on the room with boxes
  Bedroom on fire behind the small couch.
  next to the collapsed bookshelf next to exit.
  behind the shelf next to the collapsed shelves you jump off from.
  behind the play on wooden fire.
  Inside the library, to the right of the hidden door.
  
  Maybe in the attic hidden in all the mess?
  Maybe in the room with mattress?
  
  Chapter two :
  Second floor under the painting on the balcony next to the clock.
  Left of the fire place, in the corner
  To the left of the clock, behind the chair.
  In the storage room where you find the first key.
  kitchen next to the trash.
  Kitchen's storage
  By the luggage in the entrance.
  In the corner to the left of the entrance.
  
  Maybe in the dining room?
  
  Chapter three :
  In the underground bunker thingy, but i don't remember where.
  In the middle of the red doors hallway

• 
  Cheers!
  Take a picture with the camera. You'll unlock it in the locker room when taking pictures of the wall to snap the code.
  
  
• 
  Chapter I
  Complete Chapter I.
  
  
• 
  Impaled!
  When you are in the hole in the sewers to get the fuse, there is an alarm button you can activate that will spawn the Ayuwoki abomination and make him fall and get impaled by rods.
  
  
• 
  Chapter II
  Complete Chapter II.
  
  
• 
  Burning Mansion
  Upon starting Chapter II, just hold the left side of the map until you reach a spot where you can see the burning mansion from afar.
  
  
• 
  The Witness
  See a cultist. Cannot be missed, since one is guarding a key.
  
  
• 
  Sacrifice
  Get killed by a cultist.
  
  
• 
  Be my friend
  Pick up a frog on the floor. They are located before the marsh with the crumbled down cabins.
  
  
• 
  Forest Ghost
  Steal the key without being caught. I did the level on normal without being seen. I think if you're seen you hear a screech. Get to the cabin, but don't go in or else the cultist will automatically see you. You need to ''reset'' him first. To do that get to the bush that's the closest to the left door. get out of the bush, jump and then hide back in. The sound should make the cultist come out and then reset him. Now when you enter through the left door to take the key he won't see you in his blind spot. The second you pick up the key the achievement will pop-up. Be patient before going in to make sure that the wandering cultist doesn't see you.
  
  
• 
  Chapter III
  Complete chapter III.
  
  
• 
  Arachnophobia
  Get killed by a Spiderwoki.
  
  
• 
  Arachne
  Near the tower that has the fuse, look on the opposite side of the carnival, towards the hill. You'll see a small tunnel covered in hivemind flesh thingy that leads to a secret level. I won't spoil it, because it's an awesome chapter that you should experience yourself.
  
  
• 
  Let there be light!
  Contrary to the Steam description, you do not achieve this in the sewers. You get this in chapter IV when you put the fuse in the box and turn on the carnival lights. Cannot be missed.
  
  
• 
  Carnivaland!
  Reach Carnivaland after restoring the power.
  
  
• 
  What a ride!
  Survive the roller-coaster.
  
  
• 
  The Entity
  Unlocked after witnessing the entity after the roller-coaster. Cannot be missed
  
  
• 
  Nice view!
  Ride a full rotation on the ferris wheel.
  
  
• 
  Ouch!
  During the ritual, let a morphed cultist hit you.
  
  
• 
  Join to me
  Let the cultists sting you 2-3 times and you'll be grabbed by the transforming Ayuwoki.
  
  
• 
  The Summoning
  Survive till the end of the ritual without breaking any totems, nor getting killed.
  
  
• 
  Archeologyst!
  Break the three totems without getting hit.
  Pretty tricky, but you'll get the hang of it in 5-10 tries. As soon as you get hit, restart. When you spawn, go behind the totem near the first morphed cultist (I'll be calling them tentacles) count roughly 3 fast seconds and then walk backwards to dodge. Run towards the other totem that a tentacle just popped out next to. When you're behind it, count roughly to 7. Like not 7 actual seconds, just count fast and then move backwards to dodge the tentacle. You'll get a hang of the timing after 2-3 tries on this one. So once you dodge this second tentacle, head towards the third one and do the same counting to 7 trick. I might make an actual video guide on this one.
  
  
• 
  Survivor
  Circle around the tent to avoid the tentacles until the cop shows up. When he does you need to interact with the lantern to his left and he'll grab you and lead you to safety. You'll unlock the Police ending.
  
  
• 
  Chapter IV
  Complete chapter IV with any ending
  
  

I might make an actual video for certain tricky achievements like archeology and etc. Maybe even record how to do perfect speedy runs of the base & DLC game since i've mastered it, but i gotta stop being lazy and get a recording software. For now, if you need help, write a comment, or send me a message and it'll be my pleasure to coach you!