Touhou Iyuushou ~ What the Bullet Hell?!
Release date: Nov 10, 2025
Developers: Cyoltose, 雨夜枫雪制作组, 雾雨威Channel, 神心飘游堂, 阐幽赜书房
Publishers: Cyoltose
Genres: Action, Casual, Indie, Strategy
Categories: Single-player, Steam Achievements, Custom Volume Controls, Adjustable Difficulty, Keyboard Only Option, Save Anytime, Stereo Sound, Partial Controller Support, Steam Cloud, Steam Leaderboards, Family Sharing
Supported languages: English, Japanese, Simplified Chinese, Traditional Chinese

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.