Screenshots
Watch trailer on Steam ↗Rat Musou
Studio Bing-Huan · Published by Studio Bing-Huan · Official site ↗
3 user reviews — 100% positive (3 reviews) · 17 achievements
Last updated 28 Sept 2026
A top-down action survival game. Wield a chemical sprayer against relentless rat hordes across five themed arenas — sewers, night markets, a cyberpunk district, and more. Unleash powerful skills, challenge epic BOSS rats, and see how long you can hold the line.
£4.59
Lowest price we've ever recorded
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Price history
Action · 2026 · More under £5 games
About this game
Rat Musou is a top-down action survival game where you play as a lone exterminator armed with a chemical backpack sprayer. Endless waves of rats swarm from all directions — dodge, spray, and unleash powerful skills to hold your ground.
Battle through five themed arenas: grimy sewers, chaotic night markets, a bustling food court, a neon cyberpunk district, and a frenzied Japanese summer festival. Each arena brings new rat types and escalating danger.
Key Features:
Diverse rat enemy types, each with distinct behaviors
Powerful BOSS rats with increasing difficulty
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit
- Processor: Intel Core i5 / AMD Ryzen 5
- Memory: 8192 MB RAM
- Graphics: NVIDIA GTX 960 / AMD RX 480
- Storage: 500 MB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit
- Processor: Intel Core i5 / AMD Ryzen 5
- Memory: 8192 MB RAM
- Graphics: NVIDIA GTX 960 / AMD RX 480
- Storage: 500 MB available space
Supported Languages
Latest news
Patch NotesOfficial
Rat Musou v0.2.07 - Launch Window Fit Update
Rat Musou v0.2.07 is now live. This is a small quality-of-life update for desktop players. - The game window now opens maximized on launch - The play area fits the current screen size immediately, without needing to manually resize the window - The existing responsive layout remains in place, so the game continues to expand cleanly across different screen sizes Thank you for playing Rat Musou.Read full article on Community Announcements (binghuanlin)Patch NotesOfficial
Rat Musou v0.2.06 - Windows Layout Fix
Rat Musou v0.2.06 is now live. This is a small fix update focused on the Windows version. - Fixed the Title screen layout being pushed out of place on Windows - Fixed Mission Briefing and other HUD screens using incorrect safe-area margins on desktop - Safe-area handling now only applies on mobile platforms, preventing desktop UI from being shifted by OS display coordinates Thank you for playing Rat Musou.Read full article on Community Announcements (binghuanlin)Patch NotesOfficial
Rat Musou v0.2.05 - Stage 6 Laboratory Update
Rat Musou v0.2.05 is now live. - Added Stage 6: Laboratory - Added the new Stage 6 boss, Prototype-X - Prototype-X brings new attacks: corrosive claw, poison spray, jump slam, and a deadly red death ray - Added the Stage 6 clear achievement - Fixed the ending / credits timing so it appears after Stage 6 - Fixed Stage Select clear status display for the final stage - Shop upgrade prices now scale with the player's current upgrade level - Added various balance, UI, and release workflow improvements Thank you for playing Rat Musou.Read full article on Community Announcements (binghuanlin)Patch NotesOfficial
v0.2.04 - iOS Shop Fix
Fixed an iOS issue where the Helicopter Shop Next Stage button could fail to respond. Improved shop Gold/HP visibility and spacing.Read full article on Community Announcements (binghuanlin)
