Games like OPUS: Prism Peak - Official Artbook
Games like OPUS: Prism Peak - Official Artbook include What Remains of Edith Finch, Firewatch, Gone Home, Outer Wilds, and The Beginner's Guide. We matched them by the tags players give OPUS: Prism Peak - Official Artbook on Steam (Atmospheric, Lore-Rich, Walking Simulator, Mystery, and Indie): closest matches first, and among equally close ones the better-known games.

What Remains of Edith Finch
Shared: Atmospheric · Walking Simulator · Mystery

Firewatch
Shared: Atmospheric · Walking Simulator · Mystery

Gone Home
Shared: Walking Simulator · Atmospheric · Indie

Outer Wilds
Shared: Mystery · Atmospheric · Exploration

The Beginner's Guide
Shared: Walking Simulator · Atmospheric · Story Rich

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Atmospheric · Story Rich

Journey
Shared: Atmospheric · Indie · Walking Simulator

The Vanishing of Ethan Carter
Shared: Atmospheric · Mystery · Walking Simulator

Quern - Undying Thoughts
Shared: Atmospheric · Mystery · Walking Simulator

INFRA
Shared: Atmospheric · Walking Simulator · Exploration

Layers of Fear (2016)
Shared: Atmospheric · Walking Simulator · Story Rich

Before Your Eyes
Shared: Indie · Story Rich · Emotional

Return of the Obra Dinn
Shared: Mystery · Atmospheric · Story Rich

The Suicide of Rachel Foster
Shared: Atmospheric · Walking Simulator · Mystery

The Witness
Shared: Atmospheric · Exploration · Indie

OPUS: Prism Peak
Shared: Story Rich · Exploration · Atmospheric

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Story Rich · Emotional · Indie

Blue Prince
Shared: Mystery · Exploration · Atmospheric

Tacoma
Shared: Walking Simulator · Story Rich · Indie

Everybody's Gone to the Rapture
Shared: Atmospheric · Walking Simulator · Indie

Riven
Shared: Atmospheric · Exploration · Mystery

Call of the Sea
Shared: Atmospheric · Story Rich · Indie

DEATH STRANDING DIRECTOR'S CUT
Shared: Atmospheric · Walking Simulator · Story Rich

The Forgotten City
Shared: Mystery · Exploration · Story Rich