Games like The Past Within
Games like The Past Within include Tick Tock: A Tale for Two, We Were Here, Escape the Backrooms, Inside the Backrooms, and Phasmophobia. We matched them by the tags players give The Past Within on Steam (Puzzle, Online Co-Op, Multiplayer, Escape Room, and Horror): closest matches first, and among equally close ones the better-known games.

Tick Tock: A Tale for Two
Shared: Co-op · Puzzle · Online Co-Op

We Were Here
Shared: Co-op · Puzzle · Multiplayer

Escape the Backrooms
Shared: Online Co-Op · Multiplayer · Co-op

Inside the Backrooms
Shared: Puzzle · Multiplayer · Co-op

Phasmophobia
Shared: Online Co-Op · Co-op · Multiplayer

It Takes Two
Shared: Co-op · Multiplayer · Online Co-Op

We Were Here Forever
Shared: Puzzle · Online Co-Op · Co-op

Escape Simulator
Shared: Co-op · Puzzle · Multiplayer

We Were Here Together
Shared: Puzzle · Online Co-Op · Co-op

We Were Here Too
Shared: Puzzle · Online Co-Op · Co-op

Backrooms: Escape Together
Shared: Multiplayer · Online Co-Op · Co-op

PEAK
Shared: Co-op · Online Co-Op · Multiplayer

Little Nightmares III
Shared: Co-op · Puzzle · Multiplayer

Labyrinthine
Shared: Co-op · Online Co-Op · Horror

DEVOUR
Shared: Online Co-Op · Multiplayer · Co-op

Dead by Daylight
Shared: Multiplayer · Co-op · Horror

Cube Escape Collection
Shared: Puzzle · Horror · Mystery

Servant of the Lake
Shared: Puzzle · Escape Room · Point & Click

Pacify
Shared: Online Co-Op · Co-op · Multiplayer

Little Nightmares II
Shared: Puzzle · Horror · Adventure

Demonologist
Shared: Online Co-Op · Multiplayer · Co-op

Lethal Company
Shared: Online Co-Op · Co-op · Horror

The Room 4: Old Sins
Shared: Puzzle · Mystery · Escape Room