Games like Evil Water Ep1
Games like Evil Water Ep1 include Firewatch, What Remains of Edith Finch, Scanner Sombre, Layers of Fear (2016), and Cairn. We matched them by the tags players give Evil Water Ep1 on Steam (Adventure, Walking Simulator, Horror, Exploration, and Pirates): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · Atmospheric

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

Scanner Sombre
Shared: Walking Simulator · Exploration · Horror

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

Cairn
Shared: Exploration · Adventure · Stylized

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

Stray
Shared: Adventure · Exploration · Atmospheric

Journey
Shared: Adventure · Exploration · Atmospheric

The Long Dark
Shared: Exploration · Adventure · Atmospheric

NaissanceE
Shared: Exploration · Walking Simulator · Adventure

Among the Sleep - Enhanced Edition
Shared: Horror · Adventure · Walking Simulator

The Forest
Shared: Horror · Adventure · Exploration

Outer Wilds
Shared: Exploration · Adventure · Atmospheric

Gone Home
Shared: Walking Simulator · Exploration · Indie

Valley
Shared: Adventure · Exploration · Indie

Outlast
Shared: Horror · Atmospheric · Adventure

INFRA
Shared: Exploration · Walking Simulator · Adventure

Subnautica
Shared: Horror · Exploration · Adventure

SOMA
Shared: Horror · Atmospheric · Exploration

Still Wakes the Deep
Shared: Horror · Walking Simulator · Adventure

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

Little Nightmares
Shared: Adventure · Horror · Atmospheric

Fears to Fathom - Ironbark Lookout
Shared: Horror · Adventure · Exploration

Lethal Company
Shared: Horror · Exploration · First-Person