PCGame

Mamon King

Monster-raising simulation with skills that evolve through repeated use

LiTMUS Co., Ltd. · Released Dec 10, 2025

IndieRPGSimulationStrategy

Reviews
Very Positive
90% of 632
Recent reviews
Not enough recent
Players
1
daily peak, Oct 28, 2026
Steam Deck
Playable
Last update on Steam
10 months ago
Dec 26, 2025
Minimum PC
RX 560
8 GB RAM · 1 GB disk
Full requirements

What is Mamon King?

A single-player monster-raising simulation set on a ranch, with creatures summoned from another world. You plan weekly training, enter tournaments, and take board game-style expeditions as you work toward the Mamon King title. One-on-one battles use turn-based commands, with skills consuming SP.

For you if...

  • +you like managing creatures with different strengths and lifespans

Not for you if...

  • −you prefer real-time action to choosing battle commands

What players say

90% of 632 reviews are positive

Players praise the familiar Monster Rancher-style raising loop. Recurring complaints concern limited activities, repetitive progression, and uneven combat balance.

Screenshots and trailer

Mamon King screenshot 1

Mamon King system requirements

Minimum: RX 560, 8 GB RAM, 1 GB of disk space.

As published by the developer.

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Minimum

OS
64-bit Windows 10
Processor
AMD Ryzen 3 1200 ／ Intel Core i5-7500
Graphics
AMD Radeon RX 560 with 4GB VRAM ／ NVIDIA GeForce GTX 1050 Ti with 4GB VRAM
Memory
8 GB RAM
Storage
1 GB available space
DirectX
Version 12

Recommended

OS
64-bit Windows 10
Processor
Intel Core i7, Ryzen 5 CPU or Equivalent
Graphics
AMD Radeon RX 5700 ／ NVIDIA GeForce GTX 1070
Memory
8 GB RAM
Storage
2 GB available space
DirectX
Version 12

Does Mamon King have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Does Mamon King run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

  • Default controller config not fully functional
  • Sometimes shows mouse, keyboard or non-Deck controller icons
  • Some text entry requires manually opening the on-screen keyboard
  • Some in-game text is small and may be hard to read
  • Default graphics settings perform well on Steam Deck

PC version details

DRM
None declared on Steam
Controller
Keyboard and mouse
Platforms
Windows
Achievements
27
Steam features
Family Sharing
Languages
Text only: English, Japanese.

Does Mamon King use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam

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