Games like Locks
Games like Locks include Little Nightmares, Little Nightmares II, INSIDE, DARQ: Complete Edition, and Poppy Playtime. We matched them by the tags players give Locks on Steam (Horror, Dark, Adventure, Puzzle, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Little Nightmares
Shared: Horror · Adventure · Dark

Little Nightmares II
Shared: Horror · Adventure · Dark

INSIDE
Shared: Dark · Horror · Atmospheric

DARQ: Complete Edition
Shared: Horror · Dark · Adventure

Poppy Playtime
Shared: Horror · Singleplayer · Puzzle

LIMBO
Shared: Puzzle · Dark · Puzzle Platformer

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

Fran Bow
Shared: Horror · Puzzle · Psychological Horror

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

SOMA
Shared: Horror · Dark · Atmospheric

Seen
Shared: Dark · Adventure · Singleplayer

The Room Two
Shared: Puzzle · Horror · Atmospheric

Firework
Shared: Horror · Puzzle · Atmospheric

Detention
Shared: Horror · Puzzle · Atmospheric

Outlast
Shared: Horror · Atmospheric · Singleplayer

Rusty Lake Paradise
Shared: Puzzle · Adventure · Horror

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

Stray
Shared: Adventure · Singleplayer · Atmospheric

The Medium
Shared: Horror · Adventure · Dark

DISTRAINT: Deluxe Edition
Shared: Horror · Adventure · Psychological Horror

Garten of Banban
Shared: Horror · Singleplayer · Puzzle

The Room Three
Shared: Puzzle · Adventure · Atmospheric

The Room
Shared: Puzzle · Adventure · Singleplayer

ROUTINE
Shared: Singleplayer · Dark · Horror