Steam app 3444020 · updated 12 Sep 2026, 18:20 UTC
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!
719 hourly samples, with the daily peak drawn over them. Weekends are shaded.
15 months, July 2025 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 438 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 281 hourly samples. Each dip is a night. Weekends are shaded.
Demonic Mahjong was released on 15 Jul, 2025.
| Language | Full audio |
|---|---|
| Simplified Chinese | ● |
| English | |
| Japanese | ● |
| Traditional Chinese |
A blank audio cell means full audio was not marked in the returned language list.
148 achievements in total.
49 developer announcements, Apr 2025 to Aug 2026 · times in UTC
This update fixes a range of issues affecting matches, character skills, Auto-Play, and the mobile experience, while also improving parts of the UI and text.Match & Progression ImprovementsFixed an issue where canceling Auto-Play after…
Patch notesFixed an issue that prevented some Windows users from launching the game.The Mac version of the Heatwave Carnival DLC is now available.Other minor optimizations and bug fixes.
Patch notesHello everyone, the latest version that was just released fixes the following issues:Fixed an issue where matches against Ditin could freeze.Other minor bug fixes and optimizations.Some returning players who played an earlier version of the…
Patch notesOne year ago, on July 17, Demonic Mahjong launched on Steam. We were excited, but also a little nervous: would anyone enjoy this strange Underworld mahjong game with its fondness for internet humor?To our surprise, just days after launch…
OMEGames StudioHi everyone!We have some good news to share: Demonic Mahjong’s new free DLC, “Heatwave Carnival,” will officially launch on July 29!We recently wrapped voice recording for all of the new characters appearing in the DLC.For the Chinese voice…
OMEGames StudioHello everyone! The brand-new DLC for Demonic Mahjong, “Heatwave Carnival,” is now available for testing!If you’d like to join the test branch, right-click Demonic Mahjong in your Steam Library, select “Properties” → “Betas” → “testbranch,”…
OMEGames StudioHello, everyone!Today, we are revealing the third character from the brand-new free DLC for Demonic Mahjong, “Heatwave Carnival”!In the previous update, we introduced the second DLC character: Dragonvine.This time, we are introducing the…
OMEGames StudioHello, everyone!Previously we officially announced that Demonic Mahjong will be launching a brand-new free DLC, Heatwave Carnival, this summer!This DLC is themed around a summer beach party. The Flaming Hell, which should have been a…
OMEGames StudioHello everyone!Demonic Mahjong has started a historic low discount of 18% off from April 26 to May 6!But beyond the discount, there is something even more important—Since the release of the brand-new version The Snake & Horse during this…
OMEGames StudioHello everyone, we released a small patch on March 23. The main fixes included:Added the Boss Figurines Indulgence and Recklessness to the high-difficulty random pool.Fixed an issue with separators in the settlement screen for overseas…
Patch notesHello everyone! Here’s a summary of issues fixed in this update:Matches & GameplayFixed an issue where tile score VFX in the Exposed Hand did not display during a matchFixed a softlock when fighting King Qinguang, which would persist even…
Patch notesHello everyone!Thank you very much for your support of Demonic Mahjong. Since the DLC launched, we’ve received a lot of feedback from players. In particular, the day-one update caused issues for some Steam Deck users. If you were affected…
OMEGames StudioHello everyone, in the newly released update, we have fixed a series of bugs and display issues:Fixed an issue where Aqi Horse-face copying 7 Bamboo (with Rat Spirit) caused the tile spirit to disappearFixed an issue where Marionette’s…
Patch notesFixed an issue where the game incorrectly displayed as a "Beta" version on SteamDeck.Fixed an issue in the Collection page where certain cards could not be closed after being opened.Fixed an issue that prevented the "Banned/Ban Plan" menu…
Patch notesHello everyone,Tomorrow (February 10), the major free DLC “The Horse & Snake” for Demonic Mahjong will be released! A new all-time low discount will also begin on February 13!See you on February 10!In addition, the mobile version of Demonic…
OMEGames StudioHello everyone!The long-awaited major FREE DLC for Demonic Mahjong — The Horse & Snake — is here!Yes, you read that right. This is a large-scale FREE DLC!On February 10, we’ll see you in The Horse & Snake — don’t miss it!The Horse & Snake…
OMEGames StudioHey Mahjong Buddies, long time no see!Since the launch of the Ksitigarbha update last October, we’ve been racing to develop new content. We’re also fully committed to the mobile port, controller optimization, and Steam Deck adaptation—soon…
OMEGames StudioAdded map viewing functionality to the route selection page after a battle loss.Fixed the issue where BGM would overlap when returning to the main interface from Chapter 4.Adjusted the default Figurine rewards for Ksitigarbha's character…
Patch notesHello everyone! Demonic Mahjong brings you a brand-new version update !The long-awaited Englishtheme songs are now officially online, with English voice-over also unlocked. This update also introduces a random character selection mode, new…
OMEGames StudioHello everyone! A brand-new version of Demonic Mahjong is now live! This update adds the new relic "Full Moon Lamp" and exclusive battle music for fights against Ksitigarbha. It also fixes partial abnormal display issues in matches…
Patch notesHello everyone!Today, Demonic Mahjong has updated to a brand-new version. In this version, the long-awaited new character, Ksitigarbha, is now online!Today also marks the start of a 10% off discount for the game, which will last until…
OMEGames StudioHello everyone, the brand-new version of Demonic Mahjong is now available, and the long-awaited Ksitigarbha has arrived! This update not only adds the Ksitigarbha character, but also includes exclusive Ksitigarbha character achievements…
OMEGames StudioHello Mahjong enthusiasts! First of all, we sincerely apologize. The new character and BOSS we announced for early August—King Ksitigarbha—has been delayed due to development and optimization progress. We are deeply sorry for the wait. At…
OMEGames StudioHello everyone, the weekly update of Demonic Mahjong is now live! This update not only adds the new feature of automatic selling of offerings when ready to win but also fully fixes bugs such as Olden pattern calculations and BOSS skills. At…
Patch notesHello everyone, we have released a minor update, where we have fixed the following bugs:Issue of getting stuck when reviving with 0 health after purchasing an Energizing OrbIssue where the charge buff is applied to the bossIssue of the boss…
Patch notesHello everyone, in today's update, we have:Fixed the issue where the game freezes during battles against Diting;Fixed the problem where Seeping Cici's passive skill fails to trigger;Fixed the adaptation issue of the talent interface under…
Patch notesHello everyone! Demonic Mahjong is bringing you another brand-new version update! This time, we’ve added the option to reselect paths after a match loss, as well as the Coina board patterns 【Pure Terminal Chows / Mixed Terminal Chows】.…
Patch notesHello everyone! Demonic Mahjong is bringing you a brand-new version update! This time, we've added a 48-point major pattern display animation, extended it to 2 seconds, added multilingual support, enabled free reset for Talents, and…
Patch notesHello, everyone. We have just released a new update. The main contents of this update are as follows:Adjusted the distribution method of Spirit Essence, and will provide compensatory distribution to players who have met the distribution…
Patch notesHello everyone! We've just released a new update. Here's what's included:Bug Fix: Fixed a bug where the unlock conditions for King Yama were not displayed correctlyBug Fix: Fixed an issue where the volume of character voice lines couldn’t…
Patch notesHello everyone, thank you for your support!In the newly released update, we have mainly fixed the following two bugs:The issue where the dubbing volume adjustment was ineffective;The issue where the tutorial might trigger a freeze under…
Patch notesHello everyone! Thank you for your interest and support in the roguelike mahjong game Demonic Mahjong!Back in April, we nervously released our first demo—a version riddled with bugs, featuring only a handful of playable characters and…
OMEGames StudioOptimized the display of some languages in the game's multilingual version.
Patch notesHello everyone! Today we’re bringing you the latest demo update. To focus on completing the full version, this will be the final stable demo before official launch, with no major content updates (except critical bug fixes). The official…
OMEGames StudioHello everyone! "Demonic Mahjong" will be streaming our gameplay live throughout the Next Fest~ Come join us and watch!Since our producer can only broadcast in Simplified Chinese, we won't be able to provide multilingual support during the…
OMEGames StudioHello everyone! Thank you for supporting Demonic Mahjong! In this festival update, we’ve added a new character—Dìtīng, the Phoenix Egg figurine, and a series of classic patterns (winning hands), along with bug fixes including issues with…
OMEGames StudioHello everyone! "Demonic Mahjong" will be streaming our gameplay live throughout the Next Fest~ Come join us and watch!Since our producer can only broadcast in Simplified Chinese, we won't be able to provide multilingual support during the…
OMEGames StudioHello everyone! Demonic Mahjong will be available soon during the upcoming Steam Next Fest. This time, we're also bringing you an updated version packed with tons of new content! This version introduces a series of brand-new characters…
OMEGames StudioDear Mahjong Enthusiasts, The long-awaited update is finally here! This patch introduces "Difficulty 0" (Beginner Mode), 7 new Soul Puppets, 3 mysterious Relics, along with numerous bug fixes and gameplay optimizations. Update Details: New…
OMEGames StudioHello everyone! Today, we bring you a brand-new version update. This update introduces three new characters (Thirsty Female Ghost, Grudge Female Ghost, Fierce Female Ghost), a character level-up system, and many optimizations for puppets…
OMEGames StudioDear Players, Thank you for your continued support of Demonic Mahjong! This update brings multiple optimizations and fixes to improve gameplay smoothness and fairness. Below are the detailed changes: New Additions New End-of-Match Animation…
OMEGames StudioHello fellow Mahjong enthusiasts! In the latest update, we’ve introduced two new characters— and —added a 4x speed-up for winning animations (no more waiting through long settlement screens after multiple wins!), and unlocked a new…
OMEGames StudioDear Players, We’ve addressed the following issues in the April 27th update: 1. Fixed a black screen error in the Traditional Chinese version that prevented the game from launching properly. 2. Resolved a freezing issue that occurred when…
Patch notesHello everyone! Today, I'm thrilled to announce yet another major update for all of you! As always, this update is divided into three parts: , , and . This time, we've addressed long-standing issues that many of you have been concerned…
OMEGames StudioHello, fellow Mahjong enthusiasts! We're about to roll out a new game update today. Based on the version released yesterday, the new update mainly fixes and adjusts the following issues: (We're still working hard to figure out the cause of…
Patch notesHello, fellow Mahjong enthusiasts! Thank you all for your attention and support for Demonic Mahjong. Over the past week, we've been working overtime to optimize the game and develop subsequent content. In the newly released version update…
OMEGames StudioHello, dear mahjong enthusiasts! Thank you all very much for your attention to "Demonic Mahjong". We are very sorry that there are a series of problems such as bugs in the demo version, which have brought you a bad experience. We will…
Patch notesHello everyone. In the newly released update, we have focused on fixing the following issues: In some cases, losing a game deducted 2 lives. Fix for the active skill of the Reclusive Ghost. Fix for the Green Dragon Figurine. Fix for the…
Patch notesWelcome to your exciting journey through the netherworld in Demonic Mahjong! We are delighted to announce the game's demo version will be available on Steam on April 11. The game is still under emergency construction in the depths of the…
OMEGames StudioEverything Steam lists as add-on content for this game, newest first. Prices are left out on purpose: the store answers this page in one currency and it is not the reader's.
| Name | Platforms | Released |
|---|---|---|
| Demonic Mahjong: Heatwave Carnival | Windows | 29 Jul 2026 |
| Demonic Mahjong Soundtrack | WindowsmacOSLinux | 24 Sep 2025 |
What Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | Demonic Mahjong.exe | windows 64 | ||
| Launch | Demonic Mahjong.app | macos |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG