Mouthole Demystified

[HEAVY SPOILERS] I will add to this over time, in the hopes of having a complete explanation of the game.

Disclaimer

HEAVY SPOILERS AHEAD

Please experience this game at your own pace first, it's a real gem.

I am aware that documenting this all will strip some of the magic away, but there are a few things I really wish I knew earlier, such as the ability to remove the pixelation filter, which is down in the "cheat codes" section.

Areas

Shop

Unlocked by paying 1 coin at the computer.
The piano and drum kit are permanent purchases, being preserved across saves and playthroughs.

Enclosure

Unlocked by picking up the enclosure key behind the cans in the mesa.

Mesa Area

Unlocked by default.
Has enclosure key, glove item, and various car decorations outside the usual playable area once you become a car.
Home to a racetrack once you kill the driver in the car area.
Allows you to begin the horror endings by watering the plants enough, the palm tree grows and becomes climbable.

Static Area

Unlocked by opening the enclosure, grabbing the TV plug inside, and plugging in the TV for 4 hours, then turning the TV on so that it displays static.

Eyeball/Frequency/Grime Area

Unlocked by doing 3 chores in the kitchen which take 3 hours each, with only one available per day, starting on the 2nd day.

Door/City/Car Area

Unlocked by buying the lockbox key in the shop and using it on the lockbox in the static area to learn how to build the door in the main house basement. After building, open the door, and the door inside your mouth will be open too, allowing you to enter this area.

Museum

Accessed by touching the uvula 20 times, after which the esophagus will open up. Jump down the esophagus to wake up in the bathroom tiny, then walk through a small opening beside the toilet to go into the mirror version of the house. Walk out any of the doors in the mirror house into the void to go to the museum.
You cannot use the menu, save, or load saves while in the museum. You need to either teleport out with the debug keys (not recommended, you won't regain the ability to use the menu) or use the exit to end the run.

Maze

Using the trampoline, land on the wall of the garden and walk around to the corner by the bags of rice. Walk off the wall and land outside the garden and keep walking away from the house to land in a creepy maze full of strange things and scary noises. As far as I can tell there isn't anything interactable down here other than the ropes to climb back out, though there is a collectable hat and a note with the "zportz" cheat code.

Ending Achievements

Some Weeks Last Forever

You ignored the itching in your gums.
• Collapse Ending. Complete the week as normal, going to bed on the final day.

Why Did I Watch Oh Why

You saw the News, and it wasn't good.
• Get the static end by tuning into the news on the TV by activating the channel thing in the static then watching the TV at the time that the sundial in the enclosure indicates. You have to wait for the static to take over the entire house, it takes a while.

Floating Point

Following your ear, you went deep into the eye and ignored the aching in your mouth.
• Radio End.

Worries Et Al

Your friend couldn't save you, and you couldn't save your friend.
• True Horror End.

Slow Worries; A Toll

You followed your dreams, and they followed you.
• Bloody Horror End.

No Worries Atoll

You followed your dreams, to the detriment of those around you.
• Empty Horror End.

Your Life Was A Highway

You shouldn't have opened that letter.
• Become a car, use the ramp in the car area to grab the letter opener, return to your house, then use the letter opener to open the letter on the table.

Broken Legs

You lay in the corridor and felt your teeth turn to dust in your gums.
• Jump off the balcony by the stairs in the house (outside your room) where there's no handrail.

Broken Axles

You stalled out in the corridor and felt your pipes turn to rust in your gums.
• Same as Broken Legs, but after you become a car.

Your Stomach Exploded

Cold beer soothed your ulcers, but you couldn't stomach it.
• Drink all of the beer, without being a car.

Butterverse Theorist's Field Journal

You experimented with the world around you, and were rewarded.
• Mirror End. Access the museum (explained in the Areas section of the guide) then use the exit.

Non-Ending Achievements Pt. 1

This is hard for me to test, having already gotten them, but here's a tentative list:

Now His Soul Can Never Rest, Ever

You beat the ghost on the Scale Speedway, ensuring his spirit is cursed to complete fast, nice laps until time ends.
• Become a tiny car by getting your oil changed and touching the uvula 20 times. Use the tiny ramp in the car area to go to the tiny church, and interact with the item on the altar to kill the driver. Go to the mesa area and beat the ghost of the driver in a race to get this achievement. You cannot take many shortcuts, but you can cheat in certain areas that you can see the ghost also cheating, I advise you to copy them.

FASHIONHOLE

You've slipped so far down your own FASHIONHOLE that there may be no saving you.
• Wear 3 hats.

Looks Like You Could Use A Bandage!

Let me patch you up.
• Find a glitchy spot that causes you to get stuck, and be presented with the option to be teleported out. I got this driving around the edges of the mesa, but an easy way to do it once you've gotten all the endings is to noclip and de-noclip onto the wall beside your computer near the corner.

Crime Scene In[ve]stigator

You're going to get to the bottom of this.
• Buy the "cameron corder" in the shop for 5 bucks and equip it by wearing it as a hat. Then go to the mesa after the worm dies from the glove, and take a picture.

Vermicidious

...
• Give the glove to the worm, go to bed, come back to the next day to find him laying on the ground, dead.

BOUNCEHOLE

Nothing comes between you and something.
• Get the coin above the trampoline by doing enough exercise to increase your jump height on the trampoline a lot.

Mister Moneybags Over Here

Hope nobody else was planning on buying anything anytime soon.
• Buy everything in the shop.

Snooze Addict

Some mornings you just have to. Don't worry. Really, it's okay.
• Try to go to sleep in your bed first thing on day 1.

Bad Frequency

You purported too purposefully, and into the wrong personnel. Be more careful next time, kid.
• Get mugged in the static area by the guy next to the watering can. Whether this will happen or not is based on whether your hidden "fun value" stat is between 66 and 89 or not, which is seemingly randomised when you start a save.

You Slept On The Floor

You went to sleep on the floor.
• Try to do an activity that it's too late in the day to do, and say yes when it asks if you want to sleep on the floor.

Foot Ball Man Ager

You feel a decade older after that ordeal, but a goal's a goal.
• Buy the football in the shop, and kick it from the garden into the goal in the basement.

Non-Ending Achievements Pt. 2

Root, Tritone, Fifth

You played a familiar melody.
• Buy the piano from the shop/ Then play the first, then fourth, then fifth note on the piano (from the left). The notes that make the same sounds as those keys are pictured in the achievement image, but the keys on the piano in-game do not correspond to a real piano. I am unsure what "familiar melody" these notes are supposed to be.

Slideshow Bob

Nnyerrrhrr
• Run into the rakes in the horror ending area.

Vermilitterate

DESCRIPTION
• Put the glove on the worm before entering the horror area, then read all 8 pages by interacting with them.

Dystychiphilioid

Enjoy yourself however you see fit. It's your life... I guess...
• Get hit by the driver in the car area 3 times.

Glauch Potato

In the race to stop seeing, you're actually quite quick.
• Pulsate the orb in the static area to every channel and watch the TV on each one.

Gastronomical Rotation

You spun the snail, fast.
• Once you've seen all of the endings, go to the stats screen on the main menu and click the golden snail really fast for a while.

The Lonely Wanderer

In just one life, you mastered reality and reached into your own throat to claim your reward.
• Get every ending on the stat screen, then crawl into your mouth and interact with the formerly rotten (now gold) tooth.

Unsolved:

DING DING DING! BIG WIN! You're A Portfoliographer Now!

Your winnings will surely bring lasting happiness.
• Get a (big?) payout from your stocks on the computer (not sure how much is needed)

Purveyor of Plaque

Keep your mouth closed in polite company.
• allow your hidden gum cleanliness stat to go low, not sure what amount is necessary or if this means just ignoring brushing teeth for a few days. the grime you spit out from chores may also be connected.

Fruitless Flosser

Smile wide and the world will shrug its indifference back at you.
• Do the opposite.

Retinomania

You opened all of your eyes wide and revelled in their cacophonous din.
• Open all of the eyes in the eye area, then go to your radio? Not sure about the last part.

Transgressificorniacation

The more you see, the less you know. Your cursor strayed from the screen.
• I don't remember.

DRUM HOLO

Go on, let it all out.
• Not sure. Either from buying the drum kit from the shop, or growing your plants by watering them (you need to water all of them in one day for them to grow by the next day) until you wake up one morning and find one of the plants playing the drums?

Cheat Codes

• After unlocking every single ending, you gain access to the golden toilet, which gives you noclip, and the ability to teleport between areas, among other things.
  
• typing "mustache" will give the player a moustache (this is indicated on a note above the trampoline outdoors)
  
• typing "twentyfirstcentury" will disable the pixel filter, making it easier to see things (this is indicated on a note on one of the stilts in the car area)
  
• typing "zportz" spawns a football/soccer ball ⚽️ (code found in the Maze)
  
• typing "motherlode" gives $1000 to the player (The Sims reference, seemingly not found in-game)

Trivia/Tidbits

• If you get in the shower and close the door, the water will slowly burn away your skin, leaving only a skeleton behind. This lowers the fence blocking the glove in the mesa, allowing you to grab the glove without spending any of your time. (This is probably the intended way to get the glove, but everyone I've spoken to only managed to do it via becoming a car)
  
• Inside your mouth, the time on your watch is always 2:30 (tooth-hurty).
  
• The option to cleanse your aura in the garden is to remove the "solitaire effect" when you drag items near the sides of the screen, similar to the windows xp explorer crash or a source engine skybox leak.
  
• You can see what I presume is the developers' faces underneath the map in the museum if you noclip.
  
• It was possible to get stuck in the enclosure room by using the trampoline to get up where the coin is outdoors and jumping just right. The developer has now added dialogue that teleports you out when you do.
  
• If you use noclip to escape the maze, the creepy sounds won't stop. You need to use an escape rope.
  
• If you drink beer while you're a car, you'll go to jail, and the only way out is to go to bed in your cell and wake up at home the next day.
  
• If you run from the stairs to the basement onto the table in the basement, there's an illusory wall behind the tablet, where you can meet RON. If you walk into the side of that same stairs, there's another illusory wall hiding a weird worm thing.
  
• Supposedly there is an NPC in the mesa area called Keidis. Looking at the Savegame Info screen (enabled via the golden toilet) there is a hidden stat tracking "Keidis Chance" and "Times Seen Keidis". You can raise your Keidis Chance by using the trampoline, using the weights, or smoking a cigarette. The highest I've gotten is 202.02

Fun Value

When you begin a new life, you get a randomised hidden "Fun Value" from 1 to 100. This value is viewable from the debug screen if you unlock the golden toilet (get all endings).
Depending on what your Fun Value is, you will encounter different things:

• There are various music changes depending on your fun value.
  
• 1-20: The rock wall texture in the static area is changed to a more vivid one, which makes the illusory wall stand out more.
  
• 30-70: Behind one of the picture frames in the TV room, a room appears with singing macaronis.
  
• 66: The shop is bloody.
  
• 66-89: The old man mugs you if you talk to him in the static area.
  
• 22-100: On the first day, there is a knock at the door.
  
• 60-100: On the second day, there is a knock at the door.
  
• 89-100: On the third day, there is a knock at the door.

[ツ⁧⁧Astora]

Awesome! I finally have all the achievements. Adding the info to the guide. Thank you for your sacrifice in deleting your save data

[HalvedDead]

additionally, the bad frequency achievement can only be obtained with a fun value between 66 and 89, as seen on the fun value chart in the mirror ending museum. you can see it with the f12 key after getting the gold toilet. i think the fun value gets randomised for every new save so you might have to restart for a little while?
if you interact with the old man outside of those fun values then nothing happens, but if the value is within those bounds they'll mug you and you can get that achievement.

[HalvedDead]

i notice now that you dont have to actually wipe your save, you can just select a new user in the top right in the main menu. damn.

[HalvedDead]

i have info on lone wanderer.
when you get all the endings, you can go back into your mouth and find that the floating tooth near the end is gold, then you get dialogue about mastering reality and the gold toilet being installed into your home.
the achievement mentioned mastering reality in just one life. in the stats page you can see a 'lives begun' stat which i assume raises by one every time you start a new game.
the solution is to completely wipe your progress and then achieve all the endings without starting another new game, using lots of save states. i didnt do anything particularly special, i just did all the endings in a decisive and concise manner, just with the lives begun stat at 1.
thats how i got the achievement to pop up.

[heronbrai007]

Transgressificorniacation.
You gain that by typing in "mustache"
Also glad someone else made a guide with the other achievements

[ツ⁧⁧Astora]

I tried that for a while just now, managed to increment "Time Seen Keidis" by 1 but I swear I didn't see him once.

[shmumbler]

It spawns behind you. Once you're in the Mesa, just stand still, and if you hear some creepy music start playing, turn around and he'll be there and run away.

[ツ⁧⁧Astora]

Oh wow, I completely missed that Keidis thing due to the fact that the debug info screen doesn't seem to update by itself unless you disable and re-enable it. I still can't seem to run into Keidis even with a chance of 183.52, though. Did you have the glove on the worm? Where do they spawn?

[Macaria]

i think i got Retinomania by opening all eyes in the eye area, and the achievement just popped up

[shmumbler]

Also the Keidis probability value goes up each time you use the trampoline or the barbell (same amount for each, so trampoline is more efficient).
I've gotten my Keidis value over 100, and can get him to spawn fairly consistently (though not 100%)