Screenshots
Watch trailer on Steam ↗东方绮樱绘 ～ Categorical Imperative Valid?
东方绮樱绘制作组 · Published by 东方绮樱绘制作组
Last updated 7 Oct 2026
This is a game where you engage in ultra-fair danmaku battles with the girls of the Touhou Project! Dodge bullets, shoot down enemies, cast spell cards, obtain the strongest items and clothing, and build a character of your own. Let's begin a new fantastical adventure in Gensokyo!
Engage in ultra-fair danmaku battles as you guide Touhou Project girls through Gensokyo. Customize your character with the strongest items and clothing, building a unique fantasy adventure.
About this game
东方绮樱绘 ～ Categorical Imperative Valid?
This is a program that lets you enter the Touhou Project’s Gensokyo, allowing you to have ultra-fair danmaku battles against the girls there.
1. Write your own story. We will collect data about your soul and appearance. You’ll be able to wear your favorite clothes and move freely throughout Gensokyo. Try forging your own adventure story in Gensokyo!
2. A System for Fair Danmaku Battles. The bullets of enemies in this game will damage not only you, but other enemies as well. Therefore, you’ll need to learn how to “cooperate” with enemies.
3. Merit and Scoring Systems. You’ll be judged by the Yama for hurting living beings, while saving a single life is more deserving of Merit than constructing a seven-storied stupa. Try to accrue Merit and obtain the associated rewards!
4. Money System. The funds acquired in game will persist, and can be used at Kourindou to obtain more powerful weapons, spell cards, and items. Work hard to earn more funds and strengthen yourself!
5. Your choices will lead Gensokyo to multiple possible futures. Listen to the Touhou-styled yet also rebelliously rock-styled music, and begin your adventure now!
------------------------------------
Sometime after the Flower Incident, in Autumn of one year, purple cherry blossoms appeared again in Gensokyo.
These purple cherry blossoms were made to bloom by the spirits of sinners possessing the flowers.
Why had the spirits of sinners appeared in Gensokyo? Set out on an adventure and reveal the truth!
Notice of Originality
We hereby declare that Categorical Imperative Valid? was independently developed by Team Categorical Imperative Valid?. No Artificial Intelligence tools were used in the course of development, and other than those already noted, this program does not contain any publicly released work of any other person or organization. Persons or organizations who have made important contributions have been credited prominently in game.
Asset Guidelines
Categorical Imperative Valid? is an openly-available project based on LuaSTG ex+. Any user who purchases Categorical Imperative Valid? is allowed to use and modify the work’s music, visual assets, and code in any manner; giving credit is not required. However, the development team takes no responsibility for the consequences of improper use of the assets.
System Requirements
Will my PC run this? →Minimum
- OS *: Windows 7 SP1
- Processor: Intel(R) Atom(TM) x5-Z8350
- Memory: 2 GB RAM
- Graphics: Direct3D 9 compatible graphics card
- DirectX: Version 9.0c
- Storage: 2 GB available space
- Sound Card: DirectSound 8 compatible sound card
Recommended
- OS: Windows 10
- Processor: Intel(R) Core(TM) i3-4330 CPU or above
- Memory: 4 GB RAM
- Graphics: NVIDIA Geforce GT 750ti or above
- DirectX: Version 9.0c
- Storage: 2 GB available space
- Sound Card: DirectSound 8 compatible sound card
Supported Languages
Latest news
Patch NotesOfficial
2025.8.5 Recent Updates Changelog and Future Plans
2025.8.2Continued optimizing the game, reduced input lag, reduced VRAM and RAM usageFixed Sword Danmaku Art being cheesableFixed the Stage 2 boss having incorrect bullet-firing sounds, and bullet prediction lines being wrong in Stage 1. Also fixed prediction lines sometimes showing up even without Hakurei Mind's Eye of Danmaku equippedFixed "Living God" being shown as "Youkai Sage" when leveling upFixed being able to upgrade an item twice by pressing confirm rapidlyFixed some issues with leveling up to a youkai/Living God: Being able to continue, retry, and unlocking items under practice modeFixed the ninth pair of shoes being repeatedFixed being unable to take off your hat, socks, and accessoriesFixed a collision-related replay desync in Stage 3The stage 2 boss' hidden drops are automatically collected to avoid them being lost by accidentDisplay important parts of boss' hitboxesFixed a crash related to passive clothing abilitiesFixed some replays being unplayableShow the version number on screenAdjustments to the Merit Value log to prevent text overflowFixed some button settings not taking effectContinue replacing assets from the original games2025.8.3Make it harder to dodge Laser Danmaku Art on the insideFixed getting hit in the tutorial, restarting, and capturing the first spell resulting in a failed capture being displayedFixed pre-spawn bullets rendering with the wrong orientationFixed some stage 3 boss spells having no damage resistance and thus being trivially bypassableFixed a crash in the settings menuFixed text overflow in some dialogue boxesWhen holding Z to skip dialogue, also skip dialogue choices. This will not deduct Merit Value.2025.8.5Reduce the health of some spell cards so that they're capturable even without understanding the systemMake scatter-aimed bullets in stage 1 and stage 1 boss static. Refinements to the bullet shapes and fix some sprite issuesUpdated the colors of some of the stage 3 boss' bullets. Some bullets have been changed to the o...Read full article on Community Announcements (樱景琳)Patch NotesOfficial
2025.7.31 Recent Updates Changelog and Future Plans
2025.7.30 Aggregate ChangelogDefeating any attack of a boss will auto-collect all items on screenThe player can still move when presented with dialogue choicesIncreased the damage of 13 of the danmaku-firing itemsLowered the experience requirements for leveling upFixed a bug when you select “default" in the Character MakerAttempt to fix a crash when opening the gameFixed a crash when you have no spells equipped in the tutorialFixed the BGM not unlocking properlyDecreased the saturation of the background to avoid visibility issuesAllow entering the settings from the pause menu2025.7.31 Aggregate ChangelogFixed a crash when reaching Level 20Fixed the player's Level not being saved properlyDecreased the pattern difficulty on lower difficultiesFixed some typographical errorsFix some bugs with the makeup settingMoved the tutorial in the main menu to avoid mistaken selectionsOptimized the game and decrease VRAM demandChanged the Amulet Bullet Shooter item, now it's easier to hit the boss with itAdded English translation for the omakeLowered the opacity of the cherry blossoms in the Stage 2 background to improve visibilityFixed replay issues in Stage 3The GPU to use is now selectable in the settings. Previous lag could be due to the dedicated GPU not being properly utilized.Fixed esc+r during a replay not restarting the replayDefeating the Stage 3 boss no longer causes the Taking A Life penaltyFuture Plans:Add exclusive fullscreen to lower input lagImprove the settings UIOn behalf of the team, I sincerely thank our dear players for their valuable feedback.We hope to hear more of your opinions and suggestions.You can reach us via the following channels.QQ group: 816053495 Comment on the Steam store page of the demoComment on the following video, or message the video uploader on Bilibili: https://www.bilibili.com/video/BV1sp83zwEZG Email 1149775512@qq.com \ You may also ping williewillus on YouTube or Discord and he will forward your feedback to the appropriate channels.Than...Read full article on Community Announcements (樱景琳)
