The Vast Forest can be first accessed via the tree stump in the middle of Headspace. It is the central point of Headspace. To the West of the Tree Stump is Pyrefly Forest, to the north is Deep Well, and in the east is Otherworld. To the South of the Stump is the Playground and more branching paths. The Vast Forest also has a subarea and entry point to the Orange Oasis. Many of Omori's friends can be found on the playground, including Mari. To the South of the playground there is a sign and another intersection.
To the west of this sign is the Train Station and a small cave containing the Wise Rock, as well as watermelons containing jacks, poetry book, the bracelet, candy, tofu, sparkler, banana smoothie, chocolate, cherry soda, life jam, apple juice and the 3-leaf clover, Berly's lost ball can also be found here. Walking further West will bring you to the foggy bridge, which connects the west and east area together.
To the east of the sign is a grotto containing the Shadow Dog, directly above of the grotto is a ladder to the Pinwheel Forest, watermelons can also be found containing jacks, apple juice, candy, dandelion and plum juice. Going further will lead to the foggy bridge, connecting it to the west area.
Lastly, Basil's garden and house can be found further south.
Having made plans with Basil and Mari to meet them at the playground, Omori and his friends left Neighbor's Room and went to the playground in the Vast Forest.
Upon entering the playground the group spot Mari and Basil and they join them in their picnic.
After chatting a little and looking at Basil's Photo Album, Basil proposed to go to his house in the south but they get stopped by Berly before they can leave. Berly proposed to play Hide and Seek with everyone. After playing Hide and seek, the group went to Basil's house.
Upon nearing his house, Basil snaps a surprise picture of his friends. Aubrey and Kel then fight over who gets to see it first and end up pushing Basil, making him drop his Photo Album and fall.
The pictures all fly out of the Photo Album because of the fall. After picking up the photos, the group enter Basil's house and insert the photos back into the photo album. Once the group was almost done, Basil inspects a photo he doesn't recognise, a cutscene will play and Omori gets sent back to White Space.
After these events, the Vast Forest becomes the starting point of the nights spent in the Dreamworld, with the next major event appearing at the start of the third night, where all of Omori's friends disappear, with Mari then guiding the player to the Deep Well.
Since Sunny's getting further and further away from revealing the truth in this route, Mari does not show up to guide Omori in the third night, with Kel appearing instead, and while cutting the majority of the maps between the Deep Weel and Vast Forest, which represents the North Lake.
After Omori saves Basil from Black Space, Headspace gets reset. This causes small changes to the Vast Forest. The biggest change is the presence of the Hairband charms in Basil's house.
The main entrance of Headspace, connecting it to the Neighbour's Room and White Space, this area serves as an intersection to Pyrefly Forest, Otherworld, the Playground and the Deep Well.
In the first night, when Omori and friends first go through the stump, a WTF Value between 1 and 13 will be set that changes some of the events that can happen in the game, the higher more events will change, usually leading to more jumpscares.
After dealing with Something in the Dark, the Blackletter "A" can be found blocking the entrance to the playground.
In the second night, a group of Lost Sprout Moles will attack the player and reward the party with four show tickets.
The Forest Playground is the area where Omori and all his friends play hide and seek, it contains one of Mari's many picnic blankets, one of the flying mirrors scattered around Headspace, a sign that changes its content almost daily, a mailbox shop and many friends, as well as the location of the first enemy the party encounters, Boss.
While in here, Shawn and Ren are able to teach Omori the skill "observe" after the hide and seek, Daisy will offer the quest Daisy's Dilemma and reward the player with a Daisy (charm) after completing it. Berly and Van will also offer the Berly's Lost Ball quest, completing this quest will reward the player with the Butt certificate and teach Aubrey the skill "headbutt", after doing the quest and completing the tutorial, talking to Berly again while she is here will increase Aubrey's juice by 20.
Lastly, the shop located here sells Candy, Apple juice, Jacks and Presents.
The Pinwheel Forest is a subarea in Vast Forest.
It can be accessed with a ladder east of the sign right under the Playground.
The Pinwheel Forest is a high up area, many clouds are visible and it's is visibly foggy.
There are many big pinwheels sprinkeled with the trees. In the north, Mari has set up a picnic and Kite Kid can be fought, after being fought it's possible to play with the kite, Hero will have a plain normal kite, Aubrey a bunny like kite, Kel an odd kite and Omori a kite resembling the Big Yellow Cat, at the side there is also another of the many flying mirrors around Headspace.
There's also a Hat Ghost and the Blackletter "C".
Lastly, there is a watermelon stuck in one of the big pinwheel that falls if Kel throws a ball at it, it contains a spaghetti. If Kite Kid is defeated after doing this, his dialogue will change when being defeated.
- If the pinwheel is not fixed:
- Kite Kid: "Sigh... I knew it. We can't perform at our full potential without the perfect weather conditions."
- Kite kid: "The wind feels weaker today... Maybe there's something wrong with one of the pinwheels."
- If the pinwheel is fixed:
- Kite Kid: "Maybe me and my kite should try to fly somewhere else..."
Bridge & Pier
The bridge is a foggy area that connects the two sides of the Vast Forest and the pier, when arriving here during the prologue, the party will tell that Basil certainly can't be found there, there is also the Blackletter "B" near the middle.
There is not much in the pier, but if the player first arrive in this area before going to the Otherworld, it will show Stranger in an unreachable area, near the Blackletter "R", this area later can be accessed by an stair found in the Last Resort's construction site. If the party goes there during the epilogue, Cindies and Sallies will be in the area.
Path to Basil & The Old Shoe
"Path to Basil" is the name of the map located below the playground, it contains a Pluto's Spaceline station, and several flower patches made by Basil, with the tulip being dedicated to Sunny, Cactus for Kel, Gladiolus for Aubrey, roses for Hero and Mari.
He describes his friends by relating them to flowers, with the sunflower being how he wants to be.
The Old Shoe is where Head Space Basil lives. After his disappearance, the shoe house and it's surroundings will start to decay, getting worse as the Hangman game progresses.
After completing the Hangman game, the decay in Basil's house forms a hole that leads to Black Space.
If Head Space gets reset in the Hikkikomori Route, the shoe house and it's surroundings will go back to its pristine conditions, with some powerful charms to be found there.
The Train Station's an area located within the Vast Forest with various NPCs, in special:
- Leafie, who will offer the quest Rabbit Killer.
- Mountain, Goosey and Hot Diggity Dog, when interacting as Hero, will gift the party with a 4-leaf clover, 100 clams, and a hot dog respectively.
- Gibs the stationary musician, who will sing the party a song if they give him spare clams.
- A Jash that sells lemonade after the prologue.
- Mr. Outback can be found here before defeating Space Ex-Boyfriend, as he will move to Orange Oasis after it.
- A Pink dressed lady, appears only after defeating Space Ex-Boyfriend, but disappears after finishing the prologue.
After being gifted the train pass from Captain Spaceboy, the party will be able to catch the train to Orange Oasis.
The first time the party goes to the train, they will be temporally stuck in an infinite loop, after running in one direction for a while, a Dorothi will block the way, and then quickly charge at the party.
After the fight, the train will be filled with toasts, and after getting out, catching the train again will send the party straight to Orange Oasis.
Vast Forest alcoves
There are several alcoves hidden in the vast forest, which can contain items, characters or events.
The already mentioned shadow dog grotto can be found on the east area, interacting with the dog have a chance of giving the player several items, including cans, rubber bands, life jams, cherry soda, hot dog and sparklers, it will also unlock the Good Dog achievement.
The Wise Rock can be found in the west area, near the screen transition, interacting with the it allows the player to spend clams in exchange of some not very useful tips, these can be seen better at its page.
The shroom alcove can be found close to where Berly's ball found, after learning how to cut one open in Sweetheart's Castle, it's possible to reach a higher area and interact with the pink flower in the middle, doing so will have an 80% chance of receiving nothing and 20% chance of receiving either a mango smoothie, S.berry smoothie, berry smoothie or a melon smoothie, with higher chance for the latter. This can be done multiple times without penalty.
A hidden tree with a tire, at the first arrival, Something will be at the side of the tree and quickly disappear.
After Humphrey is defeated, interacting with the tree will show a short image in the background and after a screen flash, the tire and Something will be gone.
After Basil disappearance, the flowers will start to decay. Each day, after defeating one of the major Somethings, the rate which flowers decay increases until completing the Hangman puzzle, when all the flowers die.
The amount and which flower decays is decided by a variable called "Watering Decay", with a sunflower decaying after defeating every major Something, and other flowers based on other more complex variables,
with increased chances based on how far the game's progressed and how many times the player called a teleport event by changing maps.
Lastly, the flowers will only decay when the party arrives on this map.
It's possible to water the decayed flowers. This will refresh them and causes Omori and his friends to gain extra maximum hearts. This has a 25% chance of happening per watered flower.
Different flowers give hearts to its associated party member, except Omori, who gains hearts from the tulip, sunflower and the lily of the valley.
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- File wise, "Pinwheel Forest" is the name of the majority of Vast Forest, however in game only this area is known like that, in the files, this map is simply named "KITE KID".
- The Lily of the valley, the plant Basil associated to Mari, is poisonous, and can cause abdominal pain, nausea, vomiting, and irregular heartbeats if any part of it is ingested.
- The Cacti flowers' decay chance is much lower than the other flowers, while other flowers have a 20% to about 86% chances of decaying, the cacti have a 1% to about 50% chance of decaying at maximum.
- It's theorically possible to increase Omori and his friends' heart indefinitely, however, it's very time consuming, as the minimum amount of map transitions the player must take is 20 to have a small chance of decay.
- Basil:" And these... These are white tulips. Tulips aren't very flashy plants. They're not too big or small, not too elaborate or flamboyant".
Basil: "If I could put it in another way... I guess I would say that... they're comfortable. Simple, modest, and perfect. Just like Sunny"
- Basil: "Cacti are very sturdy and resilient plants by nature. They don't need much care and can survive even in seemingly impossible conditions."
Basil: "I guess what I'm saying... is that even you could take care of a cactus, Kel..."
- Basil: "These are a type of flower called the gladiolus, also known as the "sword flower"".
Basil: "As you might guess, they represent strength of character. Someone who is honest, with strong moral values... Someone who stands by their convictions..."
Basil: "The gladiolus reminds me of Aubrey, because she's always true to herself."
- Basil: "Roses come in many different colors and have their own unique meanings."
Basil: "Pink roses symbolize admiration... Orange roses symbolize passion... Yellow roses symbolize friendship... and the list goes on."
Basil: "Hero doesn't remind me of any rose in particular. I think Hero is like all roses, because he's versatile and universally loved."
- Basil: "These flowers are called lily of the valley. It's said that they're able to ward off evil spirits and help people see a brighter future..."
Basil: "I guess that's why they remind me of Mari. I can always count on her to help me stay positive."
- Basil: "These are sunflowers. They're called that because they always face towards the sun."
Basil: "That's how I want to be like... someone who always sees the bright side of things."