Games like Project Lab
Games like Project Lab include Five Nights at Freddy's: Security Breach, Bendy and the Dark Revival, Resident Evil Requiem, Five Nights at Freddy's: Secret of the Mimic, and Escape the Backrooms. We matched them by the tags players give Project Lab on Steam (Action, Horror, Adventure, First-Person, and Singleplayer): closest matches first, and among equally close ones the better-known games.

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

Bendy and the Dark Revival
Shared: Horror · Action · First-Person

Resident Evil Requiem
Shared: Horror · Action · First-Person

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

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

The Forest
Shared: Horror · Adventure · Action

Atomic Heart
Shared: Adventure · Action · Singleplayer

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

Outlast
Shared: Horror · First-Person · Singleplayer

The Beast Inside
Shared: Horror · Adventure · First-Person

Buckshot Roulette
Shared: Horror · First-Person · Singleplayer

Resident Evil Village
Shared: Horror · Action · First-Person

SILENT HILL: Townfall
Shared: Horror · Action · Adventure

Choo-Choo Charles
Shared: Horror · First-Person · Singleplayer

MiSide
Shared: Horror · First-Person · Singleplayer

Thief Simulator
Shared: Singleplayer · First-Person · Simulation

Amnesia: Rebirth
Shared: First-Person · Horror · Action-Adventure

Hello Neighbor 2
Shared: Adventure · Horror · First-Person

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

Dark Deception
Shared: Horror · First-Person · Singleplayer

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Singleplayer

Bendy and the Ink Machine
Shared: Horror · First-Person · Singleplayer

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

KLETKA
Shared: Horror · Action · First-Person