Games like Backrooms Game Creator
Games like Backrooms Game Creator include PEAK, Five Nights at Freddy's: Secret of the Mimic, Metro Exodus, The Forest, and Outlast. We matched them by the tags players give Backrooms Game Creator on Steam (Adventure, Action, Choose Your Own Adventure, Exploration, and FPS): closest matches first, and among equally close ones the better-known games.

PEAK
Shared: Adventure · Exploration · First-Person

Five Nights at Freddy's: Secret of the Mimic
Shared: Adventure · Action · First-Person

Metro Exodus
Shared: FPS · Action · Atmospheric

The Forest
Shared: Adventure · Action · Horror

Outlast
Shared: First-Person · Atmospheric · Horror

Inside the Backrooms
Shared: Adventure · Horror · Exploration

Fallout 4
Shared: Adventure · Exploration · Action

Firewatch
Shared: Adventure · Atmospheric · Exploration

Darkwood
Shared: Adventure · Action · Horror

Poppy Playtime
Shared: First-Person · Horror · Adventure

METRO Last Light Redux
Shared: Action · FPS · Atmospheric

METRO 2033 Redux
Shared: FPS · Action · Atmospheric

Escape the Backrooms
Shared: Adventure · Horror · Exploration

Lethal Company
Shared: First-Person · Exploration · Horror

Half-Life 2
Shared: Action · FPS · Adventure

Resident Evil Requiem
Shared: Action · FPS · Horror

Total Chaos
Shared: Action · Adventure · Exploration

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: FPS · Exploration · Atmospheric

SILENT HILL: Townfall
Shared: Adventure · Action · Exploration

S.T.A.L.K.E.R.: Shadow of Chornobyl - Enhanced Edition
Shared: Adventure · Action · Exploration

We Happy Few
Shared: Adventure · Action · First-Person

Black Mesa
Shared: Action · FPS · First-Person

Subnautica 2
Shared: Exploration · Adventure · Horror

Outer Wilds
Shared: Exploration · Adventure · Atmospheric