Games like Mython Island
Games like Mython Island include Clair Obscur: Expedition 33, Cassette Beasts, Digimon Story Time Stranger, Metaphor: ReFantazio, and Persona 5 Royal. We matched them by the tags players give Mython Island on Steam (Creature Collector, RPG, Turn-Based Combat, Party-Based RPG, and JRPG): closest matches first, and among equally close ones the better-known games.

Clair Obscur: Expedition 33
Shared: Turn-Based Combat · RPG · JRPG

Cassette Beasts
Shared: Creature Collector · Turn-Based Combat · Party-Based RPG

Digimon Story Time Stranger
Shared: RPG · Creature Collector · JRPG

Metaphor: ReFantazio
Shared: RPG · Turn-Based Combat · JRPG

Persona 5 Royal
Shared: JRPG · Turn-Based Combat · RPG

Baldur's Gate 3
Shared: RPG · Turn-Based Combat · Choices Matter

Persona 4 Golden
Shared: JRPG · Turn-Based Combat · RPG

FINAL FANTASY VII REMAKE INTERGRADE
Shared: RPG · JRPG · Party-Based RPG

Ruined King: A League of Legends Story™
Shared: RPG · Turn-Based Combat · Singleplayer

Persona 3 Reload
Shared: RPG · JRPG · Party-Based RPG

Temtem
Shared: Creature Collector · Turn-Based Combat · RPG

DRAGON QUEST MONSTERS: The Dark Prince
Shared: Creature Collector · RPG · Party-Based RPG

Digimon World: Next Order
Shared: Creature Collector · RPG · Party-Based RPG

FINAL FANTASY
Shared: RPG · JRPG · Turn-Based Combat

Nexomon: Extinction
Shared: Creature Collector · RPG · Turn-Based Combat

WORLD OF FINAL FANTASY®
Shared: RPG · Creature Collector · Turn-Based Combat

OCTOPATH TRAVELER II
Shared: RPG · JRPG · Party-Based RPG

FINAL FANTASY X/X-2 HD Remaster
Shared: Turn-Based Combat · RPG · JRPG

Monster Sanctuary
Shared: Creature Collector · Turn-Based Combat · Singleplayer

OCTOPATH TRAVELER™
Shared: RPG · JRPG · Turn-Based Combat

Solasta: Crown of the Magister
Shared: RPG · Turn-Based Combat · Fantasy

Digimon Story Cyber Sleuth: Complete Edition
Shared: Creature Collector · Turn-Based Combat · JRPG

Ni no Kuni Wrath of the White Witch™ Remastered
Shared: RPG · Creature Collector · JRPG

FINAL FANTASY IX
Shared: JRPG · RPG · Turn-Based Combat