Games like petrichor
Games like petrichor include Outer Wilds, Blue Prince, The Painscreek Killings, COCOON, and Inside the Backrooms. We matched them by the tags players give petrichor on Steam (Adventure, Puzzle, Exploration, 3D, and First-Person): closest matches first, and among equally close ones the better-known games.

Outer Wilds
Shared: Exploration · Adventure · Puzzle

Blue Prince
Shared: Puzzle · Exploration · Adventure

The Painscreek Killings
Shared: Exploration · Puzzle · Detective

COCOON
Shared: Adventure · Puzzle · Exploration

Inside the Backrooms
Shared: Puzzle · Adventure · Exploration

PEAK
Shared: Adventure · Exploration · First-Person

Firewatch
Shared: Adventure · Atmospheric · First-Person

Amanda the Adventurer
Shared: Puzzle · First-Person · Adventure

Chants of Sennaar
Shared: Adventure · Puzzle · Atmospheric

Stray
Shared: Adventure · Exploration · Atmospheric

Antichamber
Shared: Puzzle · First-Person · Exploration

Quern - Undying Thoughts
Shared: Adventure · Puzzle · Exploration

Riven
Shared: Adventure · Puzzle · Exploration

Murders on the Yangtze River
Shared: Puzzle · Adventure · Exploration

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

The Room 4: Old Sins
Shared: Puzzle · Adventure · Exploration

The Witness
Shared: Puzzle · Exploration · First-Person

The Talos Principle
Shared: Puzzle · First-Person · Adventure

The Vanishing of Ethan Carter
Shared: Exploration · Adventure · Atmospheric

Lorelei and the Laser Eyes
Shared: Adventure · Puzzle · Exploration

Return of the Obra Dinn
Shared: Puzzle · Detective · Atmospheric

The Exit 8
Shared: Puzzle · Exploration · First-Person

INFRA
Shared: Puzzle · Exploration · Adventure

MOLE
Shared: Adventure · Puzzle · Exploration