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Watch trailer on Steam ↗Touhou Iyuushou ~ What the Bullet Hell?!
阐幽赜书房, Cyoltose, 雨夜枫雪制作组, 雾雨威Channel, 神心飘游堂 · Published by Cyoltose
Positive — 100% positive (39 reviews) · 60 achievements
Last updated 28 Sept 2026
A Touhou Project fan-made bullet hell game inspired by Impossible Spell Card! Conquer creative, self-contained danmaku challenges using clever item strategies and sharp dodging skills. Collect stamps and prove your mastery! Prefer longer play sessions? Check out the Scene EX and PH challenges!
£8.50
Lowest price we've ever recorded
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Price history
Action, Indie, Strategy, Casual · 2025 · More £5 - £15 games
Navigate through intricate bullet hell stages, mastering clever item strategies and quick dodging. Collect stamps to prove your mastery in Touhou Iyuushou ~ What the Bullet Hell!!
About this game
Touhou Iyuushou ~ What the Bullet Hell?! is a Touhou Project fan-made bullet hell game that pays homage to Impossible Spell Card. It features a collection of short, self-contained danmaku stages—each one a standalone, visually striking bullet pattern designed to challenge your reflexes and puzzle-solving skills.
"Iyuushou" means "Testimony of Strange Encounters".
You play as Marisa Kirisame, reimagined as a danmaku researcher, investigating mysterious spell cards appearing across Gensokyo. Armed with a variety of tools, you'll analyze, survive, and outwit increasingly bizarre bullet patterns!
🧪 Core Features
🔸 Danmaku Challenge Collection
A large set of short, carefully crafted stages. Each stage is an individual bullet hell "exhibit", offering unique gameplay, aesthetics, and logic to decipher.
🔸 Strategic Item System
Bring helpful items into battle to turn the tide—but be warned, using them affects your final reward! Go in raw for greater glory.
🔸 Multiple Difficulty Levels & Challenge Styles
Tackle each stage at Easy / Normal / Hard / Lunatic difficulty. Want to prove your skill? Try clearing stages without items for maximum bragging rights!
🔸 Stamp Collection System
Clearing a stage earns you collectible stamps. Higher difficulties award more stamps, and clearing a stage without items earns you a rare, shining Gold Stamp!
🔸 Scene EX: Long-form challenges included!
Each game day features a "Scene EX", where all bosses of that day appear in succession, taking turns unleashing their bullet patterns. This provides players who enjoy longer gameplay sessions with a more complete and intense danmaku rhythm experience.
🔸 DIY Mode: Create Your Own Challenge Runs
Use levels as "cards" to freely combine and arrange them, building your own long-form bullet hell challenges. Save and share presets, and compete with friends for high points!
🔸 Daily Challenge: Fresh Danmaku Combos Every Day!
The game randomly selects different bosses to appear together each day, creating unprecedented mixed battles. Every day brings a brand-new experience!
🎯 Game Identity & Style
A Touhou Project fan game made with love for danmaku and its creative potential
Inspired by Impossible Spell Card, but expands with more solutions and player freedom
Light on story, heavy on gameplay—perfect for pick-up-and-play or long challenge runs
Catering to both quick-stage runs and marathon STG experiences
Functions both as a "danmaku art gallery" and a technical proving ground for STG fans
⚠️ Warning: This game contains flashing lights and rapid patterns that may trigger seizures in players with photosensitive epilepsy.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10/11 with updates
- Processor: CPU-Z single thread bench score 300 or higher
- Memory: 4 GB RAM
- Graphics: DIrectX 11 compatible graphics card
- Storage: 700 MB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10/11 with updates
- Processor: AMD Ryzen 7 7840H with Radeon 780M Graphics 3.80 GHz
- Memory: 16 GB RAM
- Graphics: AMD Radeon 780M Graphics
- DirectX: Version 11
- Storage: 1 GB available space
Supported Languages
Latest news
AnnouncementsOfficial
Happy April Fools' Day!
Experience a different kind of encounter this April Fools' Day!Read full article on Community Announcements (吃药图书)Patch NotesOfficial
v1.0.1 Update
Fix achievement and item issues - Fix achievements failing to unlock in certain scenarios - Fix Green Mushroom being usable infinitelyRead full article on Community Announcements (吃药图书)AnnouncementsOfficial
Touhou Iyuushou ~ What the Bullet Hell?! Released!
t,h,?;?,?,d;o,f,?;a,n,t;?,?,yMarisa Kirisame’s bullet research is finally complete! After countless explosions and retries— “Touhou Iyuushou ~ What the Bullet Hell?!” is now officially released!A bullet hell challenge STG based on the Touhou Project. Conduct strange bullet experiments, test, record, and study all kinds of mysterious “bullet anomalies”, and clear stages with different tools and strategies to collect your Stamps!Read full article on Community Announcements (吃药图书)Patch NotesOfficial
DEMO Update!
Reached — the unwritten page of Fantasy.The demo for Touhou Iyuushou ~ What the Bullet Hell?! has been updated!This update includes:New Day 4 stage and new bullet patternsA brand-new item (overpowered—use with caution!)Fixes for issues that could cause crashes, improving overall stabilityThe full release is coming on November 11—stay tuned!Read full article on Community Announcements (吃药图书)Patch NotesOfficial
🎮 Controller support? Finally nailed it!
With this update, "Touhou Iyuushou ~ What the Bullet Hell?!" officially supports controller input!✅ Key Features: Full controller support for common XInput devices such as Xbox and DualShock (except for naming conventions)Supports customizable key bindings — whether you use keyboard or controller, you can configure controls your wayBasic UI navigation is compatible with controllersKeyboard and mouse can be used simultaneously with controllers!✦ In short, there are no limits to bullet hell research — play however you want!Grab your controller and challenge those gstamp levels you haven’t cleared yet!Read full article on Community Announcements (吃药图书)






