Games like The Watcher
Games like The Watcher include Resident Evil 4, Resident Evil Village, Resident Evil 2, Resident Evil Requiem, and Resident Evil 3. We matched them by the tags players give The Watcher on Steam (Action, Horror, Arcade, Survival Horror, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Resident Evil 4
Shared: Action · Horror · Survival Horror

Resident Evil Village
Shared: Horror · Survival Horror · Action

Resident Evil 2
Shared: Horror · Survival Horror · Singleplayer

Resident Evil Requiem
Shared: Horror · Survival Horror · Action

Resident Evil 3
Shared: Action · Horror · Survival Horror

Resident Evil 4 (2005)
Shared: Action · Survival Horror · Horror

Resident Evil 7 Biohazard
Shared: Horror · Survival Horror · Singleplayer

Five Nights at Freddy's: Security Breach
Shared: Horror · Survival Horror · Singleplayer

Outlast
Shared: Horror · Survival Horror · Singleplayer

Bendy and the Dark Revival
Shared: Horror · Action · Singleplayer

Dead Space (2008)
Shared: Horror · Action · Survival Horror

Dead Space
Shared: Horror · Survival Horror · Singleplayer

Dark Deception
Shared: Horror · Singleplayer · Survival Horror

Poppy Playtime
Shared: Horror · Singleplayer · Survival Horror

The Forest
Shared: Horror · Survival Horror · Action

Ultimate Custom Night
Shared: Horror · Singleplayer · Survival Horror

The Evil Within 2
Shared: Horror · Survival Horror · Action

Outlast 2
Shared: Horror · Survival Horror · Singleplayer

Resident Evil 0
Shared: Horror · Survival Horror · Action

FIVE NIGHTS AT FREDDY'S: HELP WANTED
Shared: Horror · Singleplayer · Action

Resident Evil Revelations 2
Shared: Horror · Action · Survival Horror

METRO 2033 Redux
Shared: Horror · Action · Singleplayer

Alien: Isolation
Shared: Horror · Survival Horror · Action

Darkwood
Shared: Horror · Survival Horror · Action