Games like Scarlet Backrooms
Games like Scarlet Backrooms include Little Nightmares, Stray, Little Nightmares II, COCOON, and Outer Wilds. We matched them by the tags players give Scarlet Backrooms on Steam (3D, Adventure, Abstract, Realistic, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Little Nightmares
Shared: Adventure · Atmospheric · Singleplayer

Stray
Shared: Adventure · Atmospheric · Singleplayer

Little Nightmares II
Shared: Adventure · Singleplayer · Atmospheric

COCOON
Shared: Adventure · Puzzle · 3D

Outer Wilds
Shared: Adventure · Exploration · Atmospheric

Moncage
Shared: Adventure · Puzzle · Singleplayer

Poppy Playtime
Shared: Singleplayer · Puzzle · Horror

Antichamber
Shared: Puzzle · Abstract · Adventure

LIMBO
Shared: Puzzle · Adventure · Atmospheric

Amenti
Shared: Adventure · 3D · Atmospheric

FAR: Lone Sails
Shared: Adventure · Atmospheric · Singleplayer

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Adventure · Singleplayer

INSIDE
Shared: Atmospheric · Adventure · Dark

Chants of Sennaar
Shared: Adventure · Puzzle · Singleplayer

Viewfinder
Shared: Abstract · Puzzle · Singleplayer

The Room Three
Shared: Adventure · Puzzle · Atmospheric

The Room
Shared: Adventure · Puzzle · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Singleplayer

NaissanceE
Shared: Abstract · Atmospheric · Adventure

Zoochosis
Shared: 3D · Realistic · Atmospheric

Bramble: The Mountain King
Shared: Adventure · Atmospheric · 3D

Fran Bow
Shared: Adventure · Puzzle · Singleplayer

Sally Face - Episode One
Shared: Adventure · Puzzle · Indie

Inside the Backrooms
Shared: Adventure · Puzzle · Horror