Touhou Seirensen ~ Undefined Fantastic Object.
アレは何だ？ 鳥か？ 妖精か？ 謎に満ちた未確認幻想物体が、君を未知の世界に誘う！ ファンタスティックでレトロな弾幕シューティング幻想
- Price:$14.99
- Release Date:6/6/2020
- Developer:上海アリス幻樂団
- Publisher:Mediascape Co., Ltd.
- Last Updated:10/17/2025
- Steam App Id:1100160
Touhou Seirensen ~ Undefined Fantastic Object.
- Windows
- Mac
- Linux
- Steam Deck (Playable)
Steam Charts, Stats, and Live Player Count
At the moment, Touhou Seirensen ~ Undefined Fantastic Object. has 8 concurrent players online and in-game. This is 70% lower than its previous all-time peak of 27 players achieved on 8/25/2025.
Touhou Seirensen ~ Undefined Fantastic Object. Review
Touhou Seirensen ~ Undefined Fantastic Object. has achieved a Steambase Player Score of 96 / 100. This score is calculated from 379 total reviews on the Steam store — giving it a Very Positive rating. These are split between 363 positive reviews, 16 negative reviews, and will be updated in real-time as more players leave their feedback.
Track historical reviews and overall rating trends for Touhou Seirensen ~ Undefined Fantastic Object. using the chart below.
Touhou Seirensen ~ Undefined Fantastic Object. Price
Touhou Seirensen ~ Undefined Fantastic Object. costs $14.99 in the Steam store as of 10/17/2025. At the moment, it can only be purchased as a standalone game but may be included in future bundles for a discount.
Explore the price history chart below to track historical price changes and other pricing stats for Touhou Seirensen ~ Undefined Fantastic Object..
About Touhou Seirensen ~ Undefined Fantastic Object.
Touhou Seirensen ~ Undefined Fantastic Object. is an Indie, and Action game developed by 上海アリス幻樂団. On 6/6/2020, it was released on the Steam Store by Mediascape Co., Ltd.
It can be played and ran on Windows systems. At the moment, it is possible to play Touhou Seirensen ~ Undefined Fantastic Object. on the Steam Deck but some functionality may not be fully supported.
According to Steam’s category system, Touhou Seirensen ~ Undefined Fantastic Object. supports the following features:
- Single-player
- Steam Cloud
- Family Sharing
From the Steam community, Touhou Seirensen ~ Undefined Fantastic Object. has been tagged with the following user tags:
- Difficult
- Great Soundtrack
- Shoot 'Em Up
- Faith
- Bullet Hell
- Arcade
- Indie
- Anime
- Action
- Female Protagonist
- Singleplayer
- 2D
Media & Sceenshots
Watch the featured video for Touhou Seirensen ~ Undefined Fantastic Object. and see the latest screenshots from the Steam Store.
Related Packages
Touhou Seirensen ~ Undefined Fantastic Object. is referenced by 1 package in the Steam Store.
| Name | Price | Actions |
|---|---|---|
| 東方星蓮船 〜 Undefined Fantastic Object. | $14.99 | View |
Frequently Asked Questions
Soures & References
Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Data is enriched, cleansed, verified, and updated in real-time to ensure we surface the most up-to-date information. Learn more about the Steambase approach to data collection.
Touhou Seirensen ~ Undefined Fantastic Object. data has been sourced from:
- Valve Corporation. (2025, October 17). Touhou Seirensen ~ Undefined Fantastic Object. on Steam. Steam Store. https://store.steampowered.com/app/1100160
- Valve Corporation. (2025, October 17). Touhou Seirensen ~ Undefined Fantastic Object.. Steam Community Hub. https://steamcommunity.com/app/1100160
- 上海アリス幻樂団. (2023, July 10). Touhou Seirensen ~ Undefined Fantastic Object.. Touhou Seirensen ~ Undefined Fantastic Object.. http://www16.big.or.jp/~zun/