Games like Closed Island
Games like Closed Island include Slime Rancher, Terraria, Rain World, Carto, and Lost Ruins. We matched them by the tags players give Closed Island on Steam (Adventure, Anime, Exploration, Survival, and Cute): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Exploration · Cute

Terraria
Shared: Survival · Adventure · 2D

Rain World
Shared: Exploration · Survival · Adventure

Carto
Shared: Exploration · Cute · Adventure

Lost Ruins
Shared: Anime · Adventure · Cute

Don't Starve
Shared: Adventure · Survival · Exploration

Cat Quest II
Shared: Adventure · Exploration · Hack and Slash

Stray
Shared: Adventure · Exploration · Cute

ICEY
Shared: Anime · Adventure · Hack and Slash

A Short Hike
Shared: Adventure · Exploration · Cute

Hollow Knight
Shared: Exploration · Adventure · 2D

Muse Dash
Shared: Anime · Cute · 2D

The Long Dark
Shared: Survival · Exploration · Adventure

Milo and the Magpies
Shared: Adventure · Exploration · Cute

Deaths Door
Shared: Cute · Adventure · Cartoony

SUPER CHICKEN JUMPER
Shared: Arcade · Cute · Anime

Rabi-Ribi
Shared: Anime · Exploration · Cute

Dune: Awakening
Shared: Exploration · Survival · Adventure

Endling - Extinction is Forever
Shared: Adventure · Survival · Cute

Castle Crashers®
Shared: Adventure · 2D · Hack and Slash

Thank Goodness You're Here!
Shared: Adventure · Exploration · Hand-drawn

Escape From Duckov
Shared: Adventure · Exploration · Survival

MAHOUTEQ!
Shared: Adventure · Anime · 2D

Hollow Knight: Silksong
Shared: Exploration · Adventure · 2D