Games like Petit Island
Games like Petit Island include Slime Rancher, A Short Hike, Slime Rancher 2, Carto, and Alba: A Wildlife Adventure. We matched them by the tags players give Petit Island on Steam (Adventure, Indie, Exploration, Cute, and Family Friendly): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Exploration · Cute

A Short Hike
Shared: Adventure · Exploration · Indie

Slime Rancher 2
Shared: Cute · Relaxing · Adventure

Carto
Shared: Indie · Cute · Exploration

Alba: A Wildlife Adventure
Shared: Adventure · Family Friendly · Casual

Stray
Shared: Adventure · Exploration · Cute

AER Memories of Old
Shared: Adventure · Indie · Exploration

ABZU
Shared: Exploration · Adventure · Relaxing

Submerged
Shared: Exploration · Relaxing · Family Friendly

A Hat in Time
Shared: Cute · Adventure · Indie

Donut County
Shared: Indie · Cute · Casual

Tiny Terry's Turbo Trip
Shared: Adventure · Exploration · Indie

Meadow - A Shelter Game
Shared: Cute · Adventure · Indie

Hello Kitty Island Adventure
Shared: Adventure · Cute · Exploration

Smushi Come Home
Shared: Adventure · Cute · Exploration

Little Kitty, Big City
Shared: Exploration · Cute · Family Friendly

TOEM: A Photo Adventure
Shared: Adventure · Exploration · Cute

Rise of the Tomb Raider™
Shared: Adventure · Exploration · Singleplayer

Yonder: The Cloud Catcher Chronicles
Shared: Adventure · Exploration · Relaxing

Flower
Shared: Adventure · Relaxing · Exploration

Florence
Shared: Indie · Adventure · Casual

Cat Goes Fishing
Shared: Indie · Cute · Exploration

Grow Up
Shared: Adventure · Exploration · Indie

DAVE THE DIVER
Shared: Adventure · Exploration · Casual