Games like Sylvio: Black Waters
Games like Sylvio: Black Waters include Half-Life: Alyx, What Remains of Edith Finch, Outer Wilds, Inside the Backrooms, and SOMA. We matched them by the tags players give Sylvio: Black Waters on Steam (Exploration, FPS, Puzzle, Shooter, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

Half-Life: Alyx
Shared: FPS · Shooter · Female Protagonist

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

Outer Wilds
Shared: Exploration · Puzzle · Story Rich

Inside the Backrooms
Shared: Puzzle · Exploration · Horror

SOMA
Shared: Exploration · Horror · Psychological Horror

The Exit 8
Shared: Exploration · Puzzle · Walking Simulator

Half-Life 2
Shared: FPS · Shooter · First-Person

Fallout 4
Shared: Exploration · Shooter · FPS

Metro Exodus
Shared: FPS · Shooter · Story Rich

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: FPS · Exploration · Shooter

Black Mesa
Shared: FPS · Shooter · First-Person

Deep Rock Galactic
Shared: FPS · Exploration · Shooter

Far Cry® 5
Shared: FPS · Exploration · Shooter

BioShock Infinite
Shared: FPS · Shooter · First-Person

Firewatch
Shared: Walking Simulator · Exploration · First-Person

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

METRO 2033 Redux
Shared: FPS · Shooter · Horror

Prey
Shared: FPS · Exploration · Horror

35MM
Shared: FPS · Walking Simulator · Shooter

In Sound Mind
Shared: Puzzle · Horror · Psychological Horror

The Painscreek Killings
Shared: Exploration · Puzzle · Walking Simulator

INFRA
Shared: Exploration · Puzzle · Walking Simulator

The Talos Principle 2
Shared: Puzzle · Exploration · First-Person

Portal 2
Shared: Puzzle · First-Person · Female Protagonist