Games like Ritual
Games like Ritual include Poppy Playtime, Garten of Banban, Bendy and the Ink Machine, Sally Face - Episode One, and Buckshot Roulette. We matched them by the tags players give Ritual on Steam (Horror, Indie, Psychological Horror, Dark, and Puzzle): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Singleplayer · Puzzle

Garten of Banban
Shared: Horror · Psychological Horror · Singleplayer

Bendy and the Ink Machine
Shared: Horror · Puzzle · Singleplayer

Sally Face - Episode One
Shared: Indie · Psychological Horror · Horror

Buckshot Roulette
Shared: Horror · Dark · Indie

The Room Two
Shared: Puzzle · Horror · Mystery

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Indie

Little Nightmares II
Shared: Horror · Dark · Puzzle

Outlast
Shared: Horror · Psychological Horror · First-Person

Garten of Banban 2
Shared: Horror · Psychological Horror · Singleplayer

The Room
Shared: Puzzle · Mystery · Indie

Little Nightmares
Shared: Horror · Dark · Singleplayer

The Room Three
Shared: Puzzle · Indie · Mystery

Firework
Shared: Horror · Indie · Puzzle

SOMA
Shared: Horror · Psychological Horror · Dark

No, I'm not a Human
Shared: Horror · Psychological Horror · Indie

Visage
Shared: Horror · Psychological Horror · Dark

The Exit 8
Shared: Horror · Puzzle · Psychological Horror

Fran Bow
Shared: Psychological Horror · Horror · Puzzle

Garten of Banban 3
Shared: Horror · Psychological Horror · Singleplayer

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

Phasmophobia
Shared: Horror · Psychological Horror · Dark

Mouthwashing
Shared: Horror · Psychological Horror · Indie

IMSCARED
Shared: Horror · Indie · Psychological Horror