Games like Door
Games like Door include The Witness, Outer Wilds, Firewatch, Antichamber, and The Long Dark. We matched them by the tags players give Door on Steam (Adventure, Indie, Simulation, Puzzle, and Exploration): closest matches first, and among equally close ones the better-known games.

The Witness
Shared: Puzzle · Exploration · Indie

Outer Wilds
Shared: Adventure · Exploration · Puzzle

Firewatch
Shared: Adventure · First-Person · Indie

Antichamber
Shared: Indie · Puzzle · First-Person

The Long Dark
Shared: Exploration · Open World · Adventure

Obduction
Shared: Adventure · Indie · Puzzle

Slime Rancher
Shared: Adventure · Exploration · Open World

Big Walk
Shared: Puzzle · Adventure · Exploration

NaissanceE
Shared: Indie · Exploration · Adventure

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

Blue Prince
Shared: Puzzle · Exploration · Indie

INFRA
Shared: Puzzle · Exploration · Adventure

Kairo
Shared: Indie · Puzzle · Exploration

Rain World
Shared: Indie · Exploration · Difficult

Cairn
Shared: Indie · Adventure · Exploration

Manifold Garden
Shared: Puzzle · Exploration · First-Person

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

DREDGE
Shared: Adventure · Exploration · Open World

AER Memories of Old
Shared: Adventure · Indie · Exploration

American Truck Simulator
Shared: Simulation · Open World · Exploration

Stray
Shared: Adventure · Exploration · Puzzle

No Man's Sky
Shared: Open World · Exploration · Adventure

The Forest
Shared: Adventure · Open World · First-Person

EVE Online
Shared: Adventure · Exploration · Open World