Press kit
A perfect-information mahjong puzzle where every hand on the table must win at once.
Fact sheet
- Title
- ALL-HU: Mahjong Puzzle
- Developer
- SHJ Studio, self-published
- Based in
- Taiwan
- Platform
- iOS (App Store) · Android (Google Play) · Steam (Windows, macOS, Linux) from 2 Nov 2026
- Release
- App Store 14 Aug 2026 · Google Play 20 Aug 2026 · Steam 2 Nov 2026
- Price
- Free, with one optional non-consumable unlock. Price set per store and region.
- Genre
- Puzzle · perfect-information · thinky
- Players
- Single player
- Engine
- Godot 4 with a C++ solver/generator kernel
- Languages
- English · 繁體中文 · 简体中文 · 日本語 · 한국어 · Español · Français · Deutsch · Português
- Website
- https://all-hu.web.app
- Contact
- shjboyiosdev@gmail.com
Description
ALL-HU takes mahjong out of the hidden-information gambling genre and rebuilds it as a perfect-information puzzle. Every hand on the table, the pool and the discard pile are face up. You are not one player at the table — you are all of them, and the level is only cleared when every hand reaches a winning shape at the same time, inside a fixed budget of moves.
The action language is deliberately small: swap a tile with the pool, reclaim one from the discards, or trade a tile between two hands. On top of that small verb set the game layers rule modifiers — forbidden tiles, locked tiles, required yaku, timers — which is where the difficulty comes from, in the spirit of Slay the Spire's relics or Baba Is You's rules.
Every level is generated and then verified by the game's own C++ solver, so no level ships unsolvable, and each level's three-star threshold is set from the shortest solution that solver could find rather than from a designer's guess.
History
- Prototyped as a browser proof-of-concept to test whether a god's-eye mahjong board was a puzzle at all.
- Rebuilt in Godot 4 as a two-hand game, then extended to four hands once the swap verbs proved to scale.
- Hu validation, yaku scoring, shanten, the A*/BFS solver and the reverse-walk level generator were ported to a C++ kernel with a GDScript reference implementation kept as a fallback and a parity oracle.
- The name changed from Mahjong Cross to ALL-HU in July 2026: 'Cross' described the means (swapping), 'ALL-HU' describes the win condition players had already started using as the name for the mode.
- Content was rebuilt around the verified-solvable pipeline, ending at 900+ shipping levels across tutorial, story, free and challenge modes.
Features
- 900+ levels, every one verified solvable by the game's own solver
- Four modes: a 17-lesson mahjong course, an 11-chapter story, 200 free-mode levels, and a 577-level challenge ladder with hand-crafted zhenlong boards
- Two-hand and four-hand boards — from tidying a single hand to orchestrating four at once
- Three-star thresholds set from each level's solver-verified solution, not from a designer's estimate
- Teaches mahjong from zero: tiles, groups, the winning shape, yaku and han, special hands
- Ink-wash illustration and a guzheng score across an 11-chapter story mode
- Fully offline, no account required
- Nine languages
Monetization
Free to download with every level unlocked. Ads are non-personalised. A single non-consumable purchase removes all ads permanently and unlocks unlimited Solve demonstrations. There is no subscription, no energy system and no loot box. The exact price is set per store and region.
Monetization permission
Chih Chieh Hsu allows for the contents of ALL-HU: Mahjong Puzzle to be published through video broadcasting services for any commercial or non-commercial purposes. Monetization of videos created containing assets from ALL-HU: Mahjong Puzzle is legally & explicitly allowed by Chih Chieh Hsu.
Images
Logo & icon
Wordmark (SVG) · App icon 512 · Key art 1200×630
Credits
- Design, code, art direction
- SHJ Studio
- Typefaces
- Noto Sans / Noto Serif and IBM Plex — SIL Open Font License 1.1
- Tile faces
- Drawn from Unicode standard mahjong characters, rendered with OFL-licensed typefaces
Notes
- A 26-second trailer is available in all nine languages, recorded frame-by-frame from the real build rather than screen-captured — English cut at https://youtu.be/tvsUiVcq8g8. A shorter cut sized for App Store previews also exists. Ask and either will be sent.
- The animated solve on the home page is a real level and a real solver-verified solution, and is free to screen-capture.
- Screenshots below are the App Store submission set at full resolution, unwatermarked.
Contact
shjboyiosdev@gmail.com — an indie studio, replies in a day or two.