Games like Aporia: Beyond The Valley
Games like Aporia: Beyond The Valley include Firewatch, What Remains of Edith Finch, Outer Wilds, Layers of Fear (2016), and The Room. We matched them by the tags players give Aporia: Beyond The Valley on Steam (Adventure, Indie, Puzzle, Atmospheric, and First-Person): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Atmospheric · Walking Simulator

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

Outer Wilds
Shared: Adventure · Exploration · Atmospheric

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

The Room
Shared: Puzzle · Adventure · Atmospheric

Journey
Shared: Adventure · Indie · Atmospheric

INFRA
Shared: Puzzle · Atmospheric · Adventure

The Witness
Shared: Puzzle · First-Person · Indie

Stray
Shared: Adventure · Atmospheric · Puzzle

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

GRIS
Shared: Indie · Atmospheric · Adventure

Little Nightmares
Shared: Adventure · Atmospheric · Horror

Poppy Playtime
Shared: Puzzle · Horror · First-Person

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

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

The Room Two
Shared: Puzzle · Atmospheric · Adventure

Bendy and the Ink Machine
Shared: Puzzle · First-Person · Horror

Little Nightmares II
Shared: Adventure · Puzzle · Horror

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

The Beginner's Guide
Shared: Indie · Atmospheric · Walking Simulator

OneShot
Shared: Indie · Atmospheric · Puzzle

Brothers - A Tale of Two Sons
Shared: Adventure · Atmospheric · Indie

Homesick
Shared: Puzzle · Atmospheric · Indie

Gone Home
Shared: Indie · Walking Simulator · Atmospheric