Games like L.O.S.T.
Games like L.O.S.T. include R.E.P.O., Escape the Backrooms, Phasmophobia, Dead by Daylight, and Five Nights at Freddy's: Security Breach. We matched them by the tags players give L.O.S.T. on Steam (Action, 3D, First-Person, Horror, and Stealth): closest matches first, and among equally close ones the better-known games.

R.E.P.O.
Shared: Horror · Multiplayer · Online Co-Op

Escape the Backrooms
Shared: Horror · Multiplayer · First-Person

Phasmophobia
Shared: Horror · Multiplayer · Online Co-Op

Dead by Daylight
Shared: Horror · Multiplayer · Online Co-Op

Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · 3D

Buckshot Roulette
Shared: Multiplayer · Horror · First-Person

Left 4 Dead 2
Shared: Action · Multiplayer · Online Co-Op

PAYDAY 2
Shared: Action · Multiplayer · Stealth

PEAK
Shared: Multiplayer · Online Co-Op · First-Person

Backrooms: Escape Together
Shared: Horror · Multiplayer · Online Co-Op

Dying Light
Shared: Horror · First-Person · Online Co-Op

Outlast
Shared: First-Person · Horror · Action

The Outlast Trials
Shared: Horror · Multiplayer · First-Person

In Silence
Shared: Horror · Multiplayer · Online Co-Op

Species: Unknown
Shared: Horror · First-Person · Online Co-Op

Grand Theft Auto V Legacy
Shared: Action · Multiplayer · First-Person

GTFO
Shared: Horror · Online Co-Op · Action

Call of Duty®
Shared: Action · Multiplayer · First-Person

Boo Men
Shared: Action · Horror · Multiplayer

Far Cry 3
Shared: Action · Multiplayer · Stealth

GONE Fishing
Shared: Action · Horror · First-Person

Back 4 Blood
Shared: Multiplayer · Online Co-Op · Action

Left 4 Dead
Shared: Action · Multiplayer · Horror

Gorilla Tag
Shared: First-Person · Multiplayer · 3D