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Mamon King

Mamon King

"Mamon King" is a monster-raising simulation where you aim to become the King. Battles feature simple turn-based command combat, yet each monster possesses unique skills. Combined with the SP required to activate these skills, this creates intense strategic gameplay that anyone can easily enjoy.

Released Dec 10, 2025 Developer LiTMUS Co., Ltd. Platforms Windows SimulationCard GameCard BattlerFarming SimTurn-Based Tactics
View on Steam ↗ $12.99 (US · as of 2026-09-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-25.

89.9%positive612 reviews
Recommended · 2 found this helpful

“This game has potential for sure but its more akin to Monster Rancher at home- not bad but like... just get Monster Rancher instead if you can. Its a recommend, but with a heavy asterisk in bold. The combat depth is nonexistent as you basically just want to spam the same move…”

— a player, Steam review · 5 hrs played
Recommended · 0 found this helpful

“If you liked Monster Rancher 2 back in the day this game scratches all of those old itches in a way I have not seen in some time. highly recommend giving it a try!”

— a player, Steam review · 23 hrs played
Recommended · 0 found this helpful

“This game is a hidden gem.”

— a player, Steam review · 5 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-08 via SteamCharts.

3,977all-time peak
0 500 1k 2026 No data collected for this period 619 avg · Dec 2025

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

27achievements
11.5%median completion
0.1%rarest: Skill Master
27.1% of players 25.4% of players 21.3% of players 20.7% of players 19.7% of players 19.5% of players 17.5% of players 16.7% of players 16.1% of players 13.8% of players 13.4% of players 13.3% of players 12.8% of players 11.5% of players 11.3% of players 10.2% of players 10.2% of players 9.2% of players 7.2% of players 5.0% of players 3.2% of players 2.0% of players 0.9% of players 0.5% of players 0.2% of players 0.1% of players 0.1% of players 27.1% 0% most earned rarest
Almost everyone has
27.1%First Victory — Won an official tournament for the first time
25.4%First Summon — Summoned a Mamon to the home for the first timeor the first timeMENT_DESC_1_0
21.3%First Tournament — Participated in a tournament for the first time
Rarest badges of honor
0.1%Skill Master — Collected all types of skills
0.1%Legendary Legion — Registered All Mamons To Legendary
0.2%Legendary Round Table — Registered 12 Legendary Mamons

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-09-26. Steam prices vary by region — always confirm your local price on Steam.

$12.99current · sampled 2026-09-26 21:12 UTC
$12.99lowest since tracking began2026-09-26
US12.99 USD
EU12.79 EUR
UK10.99 GBP
Australia18.95 AUD
Canada16.99 CAD
Japan1,480 JPY
Brazil41.99 BRL
China52.00 CNY

Regional prices at last sample, in local currency — Steam sets each region's price independently.

China≈$7.7 Brazil Japan Canada US Australia UK EU≈$15

Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-25). Relative comparison only.

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Dec 26, 2025
[Version 1.1.1 Update Details]

Adjustment: Refined UI text for enhanced clarity and intuition. Adjustment: Dr. Mamon’s post-experiment reactions now dynamically scale based on the outcome’s success level. Fix: Resolved a critical c

Dec 23, 2025
Version 1.1.0 Update Notes

Added: Achievements System You can now access the Achievements page from the title screen to unlock achievements you’ve already earned. Please note that some achievements are triggered at the exact mo

Dec 16, 2025
Release 1.0.1

🌟 New Feature Added a "Pass" option to the shortcut keys during battle. (Using "Pass" causes the player's Mammon to take no action.) ⚙️ Changes Modified some dialogue and UI text. Increased the succes

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-25.

GenresIndie, RPG, Simulation, Strategy
Player tagsSimulation · Card Game · Card Battler · Farming Sim · Turn-Based Tactics · 3D · Choose Your Own Adventure · Cute · Dragons · Fantasy · Indie · Relaxing (Steam store community voting)
FeaturesSingle-player · Steam Achievements · Custom Volume Controls · Keyboard Only Option · Mouse Only Option · Playable without Timed Input · Stereo Sound · Family Sharing
LanguagesEnglish, Japanese
Achievements27
Minimum system requirements (PC)

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