Games like Project: Nightlight
Games like Project: Nightlight include Resident Evil 7 Biohazard, SOMA, Inside the Backrooms, Garten of Banban, and Poppy Playtime. We matched them by the tags players give Project: Nightlight on Steam (Psychological Horror, Survival Horror, Exploration, Puzzle, and Inventory Management): closest matches first, and among equally close ones the better-known games.

Resident Evil 7 Biohazard
Shared: Survival Horror · VR · Psychological Horror

SOMA
Shared: Psychological Horror · Survival Horror · Exploration

Inside the Backrooms
Shared: Survival Horror · Psychological Horror · Puzzle

Garten of Banban
Shared: Psychological Horror · VR · Singleplayer

Poppy Playtime
Shared: Puzzle · Survival Horror · Psychological Horror

Resident Evil Village
Shared: Survival Horror · Singleplayer · VR

FIVE NIGHTS AT FREDDY'S: HELP WANTED
Shared: VR · Survival Horror · Psychological Horror

Resident Evil 4 (2005)
Shared: Survival Horror · Inventory Management · Singleplayer

SIGNALIS
Shared: Psychological Horror · Survival Horror · Atmospheric

Amnesia: The Dark Descent
Shared: Psychological Horror · Survival Horror · Puzzle

Outlast
Shared: Survival Horror · Psychological Horror · Atmospheric

Darkwood
Shared: Survival Horror · Psychological Horror · Exploration

DREDGE
Shared: Exploration · Psychological Horror · Inventory Management

Tormented Souls
Shared: Survival Horror · Psychological Horror · Puzzle

Backrooms: Escape Together
Shared: Psychological Horror · Survival Horror · Exploration

Lethal Company
Shared: Survival Horror · Psychological Horror · Exploration

SILENT HILL 2
Shared: Psychological Horror · Survival Horror · Atmospheric

ROUTINE
Shared: Psychological Horror · Singleplayer · Atmospheric

Fallout 4
Shared: Exploration · Singleplayer · Atmospheric

BONEWORKS
Shared: VR · Puzzle · Singleplayer

Rise of the Tomb Raider™
Shared: Exploration · Singleplayer · Action

Dead Space
Shared: Survival Horror · Psychological Horror · Singleplayer

Escape the Backrooms
Shared: Psychological Horror · Survival Horror · Exploration

Half-Life: Alyx
Shared: VR · Singleplayer · Atmospheric