Games like Nuumonsters
Games like Nuumonsters include Wartales, Persona 3 Reload, Cassette Beasts, Wandering Sword, and The Witcher 3: Wild Hunt — Remastered. We matched them by the tags players give Nuumonsters on Steam (RPG, Creature Collector, Turn-Based Strategy, Open World, and Retro): closest matches first, and among equally close ones the better-known games.

Wartales
Shared: RPG · Turn-Based Strategy · Open World

Persona 3 Reload
Shared: RPG · Turn-Based Strategy · JRPG

Cassette Beasts
Shared: Creature Collector · RPG · Adventure

Wandering Sword
Shared: RPG · Open World · Adventure

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Open World · Adventure

FINAL FANTASY VII REBIRTH
Shared: RPG · Open World · Adventure

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

Aniimo
Shared: Creature Collector · Open World · RPG

For The King II
Shared: RPG · Adventure · Turn-Based Strategy

Yaoling: Mythical Journey
Shared: Creature Collector · RPG · Open World

Chained Echoes
Shared: RPG · JRPG · Retro

Metaphor: ReFantazio
Shared: RPG · JRPG · Adventure

Palworld
Shared: Creature Collector · Open World · Adventure

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

FINAL FANTASY XV WINDOWS EDITION
Shared: RPG · Open World · JRPG

Symphony of War: The Nephilim Saga
Shared: RPG · Turn-Based Strategy · Adventure

Shin Megami Tensei V: Vengeance
Shared: RPG · Creature Collector · JRPG

Digimon Story Cyber Sleuth: Complete Edition
Shared: Creature Collector · RPG · Turn-Based Strategy

Hero's Adventure: Road to Passion
Shared: RPG · Open World · Adventure

OCTOPATH TRAVELER™
Shared: RPG · JRPG · Open World

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Open World · Adventure

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

Persona 5 Royal
Shared: RPG · JRPG · Party-Based RPG

Sands of Salzaar
Shared: RPG · Open World · Adventure