Games like Office 8
Games like Office 8 include The Exit 8, Scanner Sombre, Layers of Fear (2016), SOMA, and Platform 8. We matched them by the tags players give Office 8 on Steam (Psychological Horror, Walking Simulator, Horror, First-Person, and Simulation): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Walking Simulator · Horror · Psychological Horror

Scanner Sombre
Shared: Walking Simulator · Horror · Psychological Horror

Layers of Fear (2016)
Shared: Psychological Horror · Horror · Walking Simulator

SOMA
Shared: Psychological Horror · Horror · First-Person

Platform 8
Shared: Psychological Horror · Walking Simulator · Simulation

What Remains of Edith Finch
Shared: Walking Simulator · First-Person · Exploration

Inside the Backrooms
Shared: Horror · Psychological Horror · Puzzle

Mouthwashing
Shared: Psychological Horror · Horror · Walking Simulator

September 7th
Shared: Horror · Walking Simulator · Psychological Horror

MiSide
Shared: Psychological Horror · Horror · First-Person

Amnesia: The Dark Descent
Shared: Psychological Horror · Horror · First-Person

Garten of Banban
Shared: Horror · Psychological Horror · First-Person

Firewatch
Shared: Walking Simulator · First-Person · Adventure

Outlast
Shared: Horror · First-Person · Psychological Horror

POOLS
Shared: Psychological Horror · Walking Simulator · First-Person

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Horror · Psychological Horror

Visage
Shared: Psychological Horror · Horror · First-Person

Still Wakes the Deep
Shared: Psychological Horror · Horror · Walking Simulator

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

Scorn
Shared: Horror · First-Person · Psychological Horror

Psalm 5:9-13
Shared: Psychological Horror · Horror · Walking Simulator

Poppy Playtime
Shared: Horror · First-Person · Psychological Horror

Lethal Company
Shared: Horror · First-Person · Psychological Horror

MOLE
Shared: Horror · Psychological Horror · Simulation