Games like Passage Zero
Games like Passage Zero include The Room Two, Poppy Playtime, Sally Face - Episode One, Firework, and The Room. We matched them by the tags players give Passage Zero on Steam (Psychological Horror, Short, Puzzle, Atmospheric, and Horror): closest matches first, and among equally close ones the better-known games.

The Room Two
Shared: Puzzle · Atmospheric · Mystery

Poppy Playtime
Shared: Horror · Puzzle · Psychological Horror

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

Firework
Shared: Puzzle · Horror · Psychological Horror

The Room
Shared: Puzzle · Atmospheric · Mystery

Mouthwashing
Shared: Psychological Horror · Horror · Atmospheric

What Remains of Edith Finch
Shared: Atmospheric · Mystery · Psychological Horror

LIMBO
Shared: Puzzle · Atmospheric · Horror

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

Little Nightmares II
Shared: Horror · Puzzle · Psychological Horror

Little Nightmares
Shared: Atmospheric · Horror · Puzzle

Fran Bow
Shared: Psychological Horror · Puzzle · Horror

Cube Escape Collection
Shared: Puzzle · Psychological Horror · Horror

SOMA
Shared: Psychological Horror · Horror · Atmospheric

Samsara Room
Shared: Puzzle · Psychological Horror · Short

Rusty Lake Paradise
Shared: Puzzle · Psychological Horror · Horror

The White Door
Shared: Puzzle · Psychological Horror · Short

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

Firewatch
Shared: Atmospheric · Mystery · Short

The Beginner's Guide
Shared: Atmospheric · Short · Walking Simulator

Iron Lung
Shared: Psychological Horror · Atmospheric · Horror

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Horror · Difficult

Detention
Shared: Psychological Horror · Horror · Atmospheric

The Room Three
Shared: Puzzle · Mystery · Atmospheric