I Am Sakuya FPS: Lunarian Invasion

Fight through cute enemies and tough bosses alike using your diverse arsenal of weapons and your ability to stop time! Get revenge on those Lunarians as you uncover their secret bases through 10 beautiful levels in this fully 3D FPS game based on the Touhou Project!

At a glance

• Platform: Windows.
• Genres: Action.
• Release date: Sep 25, 2025.
• Steam user reviews: Mixed (65% positive).
• Delivered as a Steam library entitlement — activation is handled by Steam.

Minimum

System requirements as published by the developer on Steam.

Activate on Steam

• Open the offer above — it takes you to this game's official Steam store page.
• Buy it there, or if you bought a key elsewhere, open Steam and choose Games → Activate a Product on Steam.
• Enter the product code exactly as it was issued to you.
• The game appears in your Steam library — download and play.

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