Demonic Mahjong is a Roguelike deckbuilding game inspired by the timeless mechanics of Mahjong. Masterfully use the tiles in your hand to craft powerful combinations, reach staggering high scores, and develop strategies that are uniquely your own!
It’s Mahjong, but not just Mahjong
Scoring follows basic Mahjong rules, so if you know how to play Mahjong, you’re already halfway there!
Roguelike gameplay is seamlessly integrated into the Mahjong foundation. Find your best strategy to win big!
It’s not just about getting high scores; the key is to find a way to defeat the boss!
Deep Mahjong Strategy
100 unique spirit allies, each capable of helping you form distinctive strategies or completely changing your core gameplay.
100 relics provide powerful buffs and permanent growth throughout your journey.
35 offerings grant special abilities, allowing you to manipulate your hand/deck and even improve your "luck."
17 tile spirits and 12 tile variants enhance your Mahjong tiles, enabling you to unleash even more powerful effects.
Build Your Ultimate Underworld Team
Each character has their own unique [Active Skill] and [Passive Skill].
Build powerful tile combinations around characters to form unique strategies and core gameplay styles.
Every character can upgrade their skill levels, and a character affinity system is also planned!
Unique Event System
How about a cup of Forgetful Tea at Granny Meng’s Tea House? Or maybe helping a shy ghost with her request?
10 regular events and 90 special events make every Mahjong journey full of surprises.
Your actions and choices in these events will have a significant impact on the subsequent battles.
Diverse Boss Battles
Accompanying you on each journey through the underworld are 24 unique bosses, including Granny Meng, Ox-Head and Horse-Face, and the Four Judges.
Each boss has their own active and passive skills. Study them to find your path to victory!
Whether you lose to them or defeat them, special animations will celebrate the moment!
windows Minimum
OS: Windows 10
Processor: AMD Ryzen 5 5600X 6-Core Processor
Memory: 8 GB RAM
Graphics: Nvidia GTX 1660 Ti
Storage: 4 GB available space
Network: Broadband Internet connection
To activate the game, you need a Steam Account
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2026-04-21
From Wishlist to Courtroom: The Steam Lawsuits Explained
There have been numerous Steam court case lawsuits throughout the years and ever since the start of the year they have made the pile even bigger! We decided to check out some of the latest accusations against the popular gaming platform as well as go through some of the previous cases that caused a stir of Valve legal issues in the past! Gabe Newell and Valve have definitely not been strangers to the court system…
As you probably know, in a huge variety of game titles there are usually a lot of mainline task objectives, but very often there are multiple side quests that would advance you further in the gameplay. This is exactly why we decided to run a Side Quest promotion on our YUPLAY site. In order to participate in it you have to make an order over 20€ between 17.04.2026 18:10 CET and 20.04.2026 02:00 CET, and you will get a 1€ voucher for next purchase…
