Preview of Backrooms: Dimension 9 browser game

ORIGINAL GAME PREVIEW / GAME OPENS ON CREATOR'S SITE

ADVENTURE / ONLINE MULTIPLAYER: UP TO 200 EXPLORERS IN A WORLD, WITH VOICE CHAT BY DISTANCE

Backrooms: Dimension 9

Wander an endless Backrooms as an astronaut with up to 200 other players in your world, and log the places, hunters and residents an AI keeps adding.

BackroomsHorrorExplorationMultiplayerVoice chatAI-built
MADE BYapek ↗
PLAYER RATINGNo ratings yet. Be the first ↓
ARCADE VISITS17 (0 today)
AI BUILD CREDITMaker: an AI inside the game keeps building new rooms, entities and characters
ON THE WALL SINCENov 8, 2026

OUR TAKE / EDITORIAL

Why it's on the wall

An Apollo lander parked in the Backrooms, a TV-headed usher, and a couple hundred astronauts lost in the same yellow halls. An AI keeps adding rooms, so some of tonight's halls weren't there yesterday.

Written by Neon Gamewall. An opinion, not a player rating.

GAME BRIEF

What's the game?

The title card reads 'july 20, 1969. 20:17 UTC.', the minute Apollo 11 landed on the Moon, and you arrive as an astronaut in the Backrooms: yellow pillars, rows of ceiling lights, a lunar module and an American flag standing in the Atrium, and a man in a suit with a television for a head, the Usher, who tells you to 'find the others'. You see it all through a camcorder with a 1996 date stamp. The scanner (Q) 'hears their hearts', an EMP (R) shows what's behind the walls, and the logbook (Tab) keeps what you find: 70 fragments, each one 'left by a door', plus Places, Hunters, Residents and your own notes. The menu's Survey counts what every explorer has found together; when we looked it was 151 of 151, 128 places, 13 hunters and 10 residents, among them The Swimmer, The Car Park, The Poolhall, The Conversation Pit, Classroom 9 and a hunter called The Car. Its maker, apek, says he put an AI inside the game and told it never to stop building, and overnight it added 50 rooms, 9 entities and 5 harmless characters. The game says it too: 'It never ends. It keeps building itself.'

BEFORE YOU PLAY

What to expect

Free, with no download and no sign-up: you get an explorer file (ours was Arrival 6407) and a code to carry it to another device. The title screen came up in a few seconds on our PC. Up to 200 explorers share a world; we landed in world 1 of 2 with about 200 others, and other astronauts walk past with their names over their heads. Voice chat works by distance: the screen tells you when someone's near, and your mic stays off until you press T. apek, a solo developer, released it on November 7, 2026. He says 35,000 people played in the first 36 hours, about 1,200 of them at once, and that a server for 2,000 players in one world is coming.

Controls: Keyboard and mouse: W A S D move, the mouse looks, Shift runs, C crouches, Q scanner, R EMP scan, M map, E use or pick up, F flashlight, T mic on or off, Tab logbook. Also U sound, V camcorder, B motion blur, L lens, H hide the HUD, N skip to the next anomaly.

QUESTIONS PEOPLE ASK

Common questions

Is Backrooms: Dimension 9 free?

Yes. It's free in the browser at dimension9.space, with no download and no sign-up.

Is Dimension 9 multiplayer?

Yes. Up to 200 explorers share a world, other players show up as astronauts with their names over their heads, and there's voice chat with whoever is near (your mic stays off until you press T). Its maker says a server for 2,000 players in one world is coming.

Who made Backrooms: Dimension 9?

apek (@apekshik on X), a solo developer who also made the F-16 flight sim VIPER 11.

Was Dimension 9 made with AI?

Its maker says he put an AI inside the game and told it never to stop building; overnight it added 50 rooms, 9 entities and 5 harmless characters.

What do you do in Dimension 9?

Explore and keep a record: the scanner hears what's near, an EMP shows things through walls, and the logbook collects 70 fragments plus the places, hunters and residents you find.

SOURCE & CREDIT

Meet the maker

apek ↗

apek is a developer in San Francisco who works on AI at fal, per his X profile, and posts videos as apek++ on YouTube. He also made VIPER 11, the F-16 dogfighter.

More from this maker on the wall: VIPER 11

The creator publicly credits the AI tool shown above. Visit the creator's game page for current details.

Made this game? Grab the Listed badge and see what we send you ↗

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