Games like Peace Island
Games like Peace Island include The Witcher 3: Wild Hunt — Remastered, Fallout 4, A Short Hike, Fallout: New Vegas, and Tainted Grail: The Fall of Avalon. We matched them by the tags players give Peace Island on Steam (Early Access, Adventure, Indie, RPG, and Casual): closest matches first, and among equally close ones the better-known games.

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Adventure · Open World

Fallout 4
Shared: Adventure · Open World · RPG

A Short Hike
Shared: Adventure · Indie · Exploration

Fallout: New Vegas
Shared: RPG · Open World · Adventure

Tainted Grail: The Fall of Avalon
Shared: Adventure · RPG · Open World

Hogwarts Legacy
Shared: Adventure · Open World · RPG

Cat Quest
Shared: Adventure · RPG · Cats

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Indie · Adventure

Stray
Shared: Adventure · Cats · Exploration

Sands of Salzaar
Shared: RPG · Indie · Adventure

Journey
Shared: Adventure · Indie · Beautiful

Firewatch
Shared: Adventure · Story Rich · Indie

The Elder Scrolls Online - Standard Edition
Shared: RPG · Adventure · Open World

Outer Wilds
Shared: Adventure · Exploration · Story Rich

The Elder Scrolls IV: Oblivion Remastered
Shared: RPG · Adventure · Open World

Rise of the Tomb Raider™
Shared: Adventure · Open World · Exploration

Slime Rancher
Shared: Adventure · Exploration · Open World

Kingdom Come: Deliverance II
Shared: RPG · Open World · Adventure

DAVE THE DIVER
Shared: Adventure · Casual · RPG

GRIS
Shared: Indie · Adventure · Beautiful

My Time at Portia
Shared: RPG · Open World · Adventure

Eastshade
Shared: Adventure · RPG · Open World

Assassin's Creed® Odyssey
Shared: RPG · Open World · Adventure

Florence
Shared: Indie · Adventure · Casual