Games like Redlight
Games like Redlight include Lethal Company, Backrooms: Escape Together, Escape the Backrooms, The Outlast Trials, and Subliminal. We matched them by the tags players give Redlight on Steam (Horror, Realistic, Atmospheric, Exploration, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

Lethal Company
Shared: Horror · Exploration · Psychological Horror

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Atmospheric

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

The Outlast Trials
Shared: Horror · Psychological Horror · Character Customization

Subliminal
Shared: Realistic · Atmospheric · Psychological Horror

Outlast
Shared: Horror · Atmospheric · Psychological Horror

Content Warning
Shared: Horror · Exploration · Procedural Generation

SOMA
Shared: Horror · Atmospheric · Psychological Horror

PEAK
Shared: Exploration · Atmospheric · Adventure

Fears to Fathom - Ironbark Lookout
Shared: Horror · Atmospheric · Psychological Horror

SILENT HILL: Townfall
Shared: Horror · Psychological Horror · Exploration

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · Exploration · Atmospheric

Little Nightmares II
Shared: Horror · Atmospheric · Psychological Horror

Zort
Shared: Horror · Psychological Horror · Atmospheric

Summer of '58
Shared: Horror · Atmospheric · Psychological Horror

A Plague Tale: Requiem
Shared: Exploration · Atmospheric · Action-Adventure

Total Chaos
Shared: Horror · Psychological Horror · Atmospheric

Pacify
Shared: Horror · Psychological Horror · Exploration

PILGRIM
Shared: Horror · Exploration · Dungeon Crawler

Darkwood
Shared: Horror · Psychological Horror · Atmospheric

The Complex: Expedition
Shared: Horror · Realistic · Exploration

MiSide
Shared: Horror · Psychological Horror · Atmospheric

Inside the Backrooms
Shared: Horror · Psychological Horror · Exploration

Subnautica 2
Shared: Horror · Exploration · Atmospheric