Games like Valley of Shadow
Games like Valley of Shadow include What Remains of Edith Finch, Firewatch, Outer Wilds, Blue Prince, and Return of the Obra Dinn. We matched them by the tags players give Valley of Shadow on Steam (Puzzle, Story Rich, Atmospheric, Singleplayer, and First-Person): closest matches first, and among equally close ones the better-known games.

What Remains of Edith Finch
Shared: Story Rich · Atmospheric · First-Person

Firewatch
Shared: Story Rich · Atmospheric · First-Person

Outer Wilds
Shared: Story Rich · Mystery · Puzzle

Blue Prince
Shared: Puzzle · Mystery · Story Rich

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

The Talos Principle
Shared: Puzzle · Story Rich · First-Person

Riven
Shared: Puzzle · Story Rich · Singleplayer

Quern - Undying Thoughts
Shared: Puzzle · Atmospheric · Mystery

INFRA
Shared: Puzzle · Atmospheric · First-Person

The Witness
Shared: Puzzle · First-Person · Singleplayer

Gone Home
Shared: Atmospheric · Walking Simulator · Story Rich

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

Call of the Sea
Shared: Puzzle · Story Rich · First-Person

The Room
Shared: Puzzle · Atmospheric · Mystery

Brothers - A Tale of Two Sons
Shared: Story Rich · Atmospheric · Puzzle

Layers of Fear (2016)
Shared: Atmospheric · Story Rich · First-Person

The Room 4: Old Sins
Shared: Puzzle · Mystery · Singleplayer

Portal 2
Shared: Puzzle · Singleplayer · Story Rich

Spirit of the North
Shared: Atmospheric · Puzzle · Story Rich

The Vanishing of Ethan Carter
Shared: Atmospheric · Mystery · First-Person

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

Hogwarts Legacy
Shared: Singleplayer · Story Rich · Adventure

The Last Campfire
Shared: Puzzle · Singleplayer · Atmospheric

Obduction
Shared: Puzzle · First-Person · Adventure