Games like Dark Harvest
Games like Dark Harvest include Poppy Playtime, Five Nights at Freddy's: Security Breach, Garten of Banban, Bendy and the Ink Machine, and Outlast. We matched them by the tags players give Dark Harvest on Steam (Horror, First-Person, Retro, Linear, and Puzzle): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · First-Person · Puzzle

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

Garten of Banban
Shared: Horror · First-Person · Puzzle

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

Outlast
Shared: Horror · First-Person · Singleplayer

Inside the Backrooms
Shared: Horror · Puzzle · First-Person

Buckshot Roulette
Shared: Horror · First-Person · Dark

Garten of Banban 2
Shared: Horror · First-Person · Puzzle

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

SOMA
Shared: Horror · First-Person · Dark

Escape the Backrooms
Shared: Horror · First-Person · 3D

Amnesia: The Dark Descent
Shared: Horror · First-Person · Puzzle

The Exit 8
Shared: Horror · Puzzle · First-Person

Little Nightmares
Shared: Horror · Puzzle · Singleplayer

Little Nightmares II
Shared: Horror · Puzzle · Singleplayer

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

Amanda the Adventurer
Shared: Horror · First-Person · Puzzle

Lethal Company
Shared: Horror · First-Person · Survival Horror

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

Garten of Banban 3
Shared: Horror · First-Person · Puzzle

Amnesia: Rebirth
Shared: First-Person · Horror · Puzzle

Layers of Fear (2016)
Shared: Horror · First-Person · Singleplayer

MiSide
Shared: Horror · First-Person · 3D

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