Chained in Backrooms

Chained in Backrooms is a co-op horror obby by verified developers Musta and Alexander on Roblox, launched April 2025. In one year it reached 79.8 million visits and 518.7K favorites. Up to 8 players chain together and descend through 15 numbered Backrooms levels, each with a distinct atmosphere, name, and badge. Servers hold 25 players.

The Backrooms setting - infinite liminal spaces of yellow-carpeted rooms under fluorescent light - frames each level as a new type of unsettling environment. Players work together to survive creatures, solve puzzles, and complete missions while physically chained to their squad:

• 🗺️ 15 levels - each with a named atmosphere ranging from Landspace's Dust (Level 2) to The Green Mist (Level 14) to Fragmented (Level 15)
• ⚔️ Boss encounter - ENT-003, known as Smilers, appears in the Level 11 area and must be defeated to progress
• 💎 Two endings - Good Ending and Bad Ending badges wait at Level 15, with the path determining which conclusion players reach
• 🎭 Mission structure - each level contains objectives beyond navigation, adding puzzle-solving alongside creature survival
• 🏠 Chain cosmetics - Love Chain, Fire Chain, Toxic Chain, Poop Chain, and Rainbow Chain passes change the visual link between squad members

The chain keeps squad members physically connected throughout all 15 levels, making coordination critical when creatures or obstacles force the group apart. A free in-game reward is available by joining the Musta and Alexander group and liking the game.

Heavily inspired by the PC game Chained in the Backrooms. For a faster, shorter asymmetric horror experience, Centipede offers basement survival with a much smaller player count.