Games like Fantasy Island
Games like Fantasy Island include Notes of Soul, Marvel Rivals, Touhou Big Big Battle, Plebby Quest: The Crusades, and OMON Simulator. We matched them by the tags players give Fantasy Island on Steam (Action, Indie, Casual, Adventure, and RPG): closest matches first, and among equally close ones the better-known games.

Notes of Soul
Shared: Action · Adventure · Indie

Marvel Rivals
Shared: Action · Free to Play · Sexual Content

Touhou Big Big Battle
Shared: Indie · Action · Casual

Plebby Quest: The Crusades
Shared: Indie · Casual · Action

OMON Simulator
Shared: Action · Indie · Simulation

Where Winds Meet
Shared: Adventure · Free to Play · Indie

Once Human
Shared: Action · Free to Play · Adventure

Mount & Blade II: Bannerlord
Shared: RPG · Action · Strategy

Book of Yog Idle RPG
Shared: Simulation · Casual · Adventure

Caster
Shared: Action · Indie · Adventure

SMITE®
Shared: Action · Free to Play · Strategy

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

Dead Age
Shared: RPG · Adventure · Casual

Lost
Shared: Casual · Indie · Action

Home Behind
Shared: Adventure · Indie · RPG

G2 Fighter / 基因特工
Shared: Action · Indie · Adventure

Idle Champions of the Forgotten Realms
Shared: Adventure · Indie · Strategy

SMITE 2
Shared: Action · Adventure · Casual

EmergeNYC
Shared: Action · Simulation · Indie

Achievement Clicker
Shared: Casual · Indie · Action

Retrowave
Shared: Indie · Casual · Action

Streamer Life Simulator
Shared: Casual · Simulation · Indie

Wobbly Life
Shared: Adventure · Action · Simulation

UFO 50
Shared: Indie · Action · RPG