Games like I'm on Observation Duty 8
Games like I'm on Observation Duty 8 include Fran Bow, The Room Two, Sally Face - Episode One, Mouthwashing, and Firework. We matched them by the tags players give I'm on Observation Duty 8 on Steam (Psychological Horror, Horror, Psychological, Atmospheric, and Puzzle): closest matches first, and among equally close ones the better-known games.

Fran Bow
Shared: Psychological Horror · Horror · Puzzle

The Room Two
Shared: Puzzle · Atmospheric · Horror

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

Mouthwashing
Shared: Psychological Horror · Horror · Atmospheric

Firework
Shared: Horror · Psychological Horror · Puzzle

Rusty Lake Paradise
Shared: Psychological Horror · Puzzle · Horror

The Room
Shared: Puzzle · Atmospheric · Point & Click

Cube Escape Collection
Shared: Horror · Psychological Horror · Puzzle

The Room Three
Shared: Puzzle · Atmospheric · Point & Click

Detention
Shared: Horror · Psychological Horror · Atmospheric

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

Servant of the Lake
Shared: Puzzle · Psychological Horror · Point & Click

Poppy Playtime
Shared: Horror · Puzzle · Psychological Horror

I'm on Observation Duty 6
Shared: Psychological Horror · Horror · Puzzle

SILENT HILL 2
Shared: Psychological Horror · Horror · Atmospheric

MiSide
Shared: Psychological Horror · Horror · Atmospheric

Little Nightmares II
Shared: Horror · Psychological Horror · Puzzle

I'm on Observation Duty 4
Shared: Psychological Horror · Horror · Psychological

Rusty Lake: Roots
Shared: Psychological Horror · Puzzle · Horror

Little Nightmares
Shared: Horror · Atmospheric · Puzzle

Rusty Lake Hotel
Shared: Puzzle · Horror · Psychological Horror

SOMA
Shared: Psychological Horror · Horror · Atmospheric

Phasmophobia
Shared: Horror · Psychological Horror · Investigation

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