Games like Island Clicker
Games like Island Clicker include To The Core, Cookie Clicker, Idle Champions of the Forgotten Realms, Keep on Mining!, and Gorogoa. We matched them by the tags players give Island Clicker on Steam (Casual, Arcade, Incremental, 2D, and Indie): closest matches first, and among equally close ones the better-known games.

To The Core
Shared: Casual · Incremental · Arcade

Cookie Clicker
Shared: Incremental · Casual · Indie

Idle Champions of the Forgotten Realms
Shared: Incremental · Free to Play · Casual

Keep on Mining!
Shared: Casual · Incremental · Indie

Gorogoa
Shared: Indie · Hand-drawn · Casual

A Dance of Fire and Ice
Shared: Arcade · Indie · 2D

Nodebuster
Shared: Casual · Incremental · Arcade

Shelldiver
Shared: Casual · Incremental · Arcade

Timberman
Shared: Casual · Indie · 2D

A Game About Feeding A Black Hole
Shared: Casual · Incremental · Indie

Firework
Shared: Indie · 2D · Atmospheric

Space Rock Breaker
Shared: Casual · Incremental · Arcade

Chef Knight
Shared: Incremental · Casual · Hand-drawn

GRIS
Shared: Indie · Atmospheric · Hand-drawn

Vampire Survivors
Shared: 2D · Indie · Casual

Hollow Knight
Shared: 2D · Indie · Atmospheric

Russian Life Simulator
Shared: Incremental · 2D · Indie

Melvor Idle
Shared: Casual · Indie · 2D

Deep Space Cache
Shared: Casual · Incremental · Indie

That's not my Neighbor
Shared: Casual · Indie · Arcade

The Adventure of NAYU
Shared: Casual · Incremental · 2D

Keep on Mining! - Worlds
Shared: Casual · Incremental · Indie

Incredicer
Shared: Casual · Incremental · Indie

The Death Game Report
Shared: Casual · Indie · Mystery