Games like Ethel
Games like Ethel include Outer Wilds, What Remains of Edith Finch, Firewatch, SOMA, and The Exit 8. We matched them by the tags players give Ethel on Steam (Horror, Exploration, Multiple Endings, Puzzle, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Outer Wilds
Shared: Exploration · Mystery · Atmospheric

What Remains of Edith Finch
Shared: Atmospheric · Exploration · Story Rich

Firewatch
Shared: Atmospheric · Exploration · Story Rich

SOMA
Shared: Horror · Atmospheric · Exploration

The Exit 8
Shared: Exploration · Horror · Puzzle

Amnesia: A Machine For Pigs
Shared: Horror · Atmospheric · Exploration

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

Inside the Backrooms
Shared: Horror · Puzzle · Exploration

INFRA
Shared: Exploration · Puzzle · Atmospheric

The Room Two
Shared: Puzzle · Horror · Atmospheric

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

The Painscreek Killings
Shared: Exploration · Horror · Puzzle

MiSide
Shared: Horror · Story Rich · Atmospheric

Scanner Sombre
Shared: Exploration · Horror · Atmospheric

The Room Three
Shared: Puzzle · Mystery · Atmospheric

Killer Frequency
Shared: Horror · Puzzle · Simulation

The House of Da Vinci
Shared: Puzzle · Exploration · Mystery

Blue Prince
Shared: Exploration · Puzzle · Mystery

Sally Face - Episode One
Shared: Horror · Story Rich · Puzzle

No, I'm not a Human
Shared: Horror · Multiple Endings · Atmospheric

The Room
Shared: Puzzle · Atmospheric · Mystery

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

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

Amanda the Adventurer
Shared: Horror · Puzzle · Mystery