Games like The Mailroom
Games like The Mailroom include The Exit 8, MiSide, Layers of Fear (2016), SOMA, and The Boba Teashop. We matched them by the tags players give The Mailroom on Steam (Horror, Psychological Horror, Puzzle, Immersive Sim, and Management): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Puzzle · Horror · Psychological Horror

MiSide
Shared: Psychological Horror · Horror · Atmospheric

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

SOMA
Shared: Horror · Psychological Horror · Atmospheric

The Boba Teashop
Shared: Horror · Psychological Horror · Atmospheric

Poppy Playtime
Shared: Horror · Puzzle · Psychological Horror

The Death | Thần Trùng
Shared: Horror · Psychological Horror · Puzzle

Garten of Banban
Shared: Horror · Psychological Horror · Puzzle

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

Kiosk
Shared: Horror · Psychological Horror · Immersive Sim

Inside the Backrooms
Shared: Horror · Puzzle · Psychological Horror

The Cabin Factory
Shared: Horror · Psychological Horror · Immersive Sim

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

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

Little Nightmares II
Shared: Horror · Puzzle · Psychological Horror

Scanner Sombre
Shared: Horror · Psychological Horror · Atmospheric

Lobotomy Corporation | Monster Management Simulation
Shared: Psychological Horror · Management · Horror

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Atmospheric

Outlast
Shared: Horror · Psychological Horror · Atmospheric

Little Nightmares
Shared: Horror · Atmospheric · Puzzle

Fran Bow
Shared: Psychological Horror · Horror · Puzzle

PC Building Simulator
Shared: Immersive Sim · Management · Simulation

[Chillas Art] The Convenience Store
Shared: Horror · Psychological Horror · Casual

Detention
Shared: Horror · Psychological Horror · Puzzle