Screenshots
Watch trailer on Steam ↗RIOO
Project Ground Zero · Published by Project Ground Zero
Positive — 82% positive (11 reviews) · 6 achievements
Last updated 28 Sept 2026
The goddess of water who summoned you is nowhere to be found. Facing a tidal wave of monsters, you must join forces with other brave people who were summoned like you to repel them! Find the best combination of various strange weapons to survive the waves of attacks!
£0.89
Lowest price we've ever recorded
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Price history
Adventure, Indie, Casual · 2024 · More under £5 games
In RIOO, team up with other summoned beings and wield strange weapons to fend off waves of monsters. Explore an adventure filled with casual fun and indie creativity.
About this game
Game Features:
Fast-paced survivor game
4 different anime style characters to choose from!
Up to six weapons to equip, find the best combination to match and blow up all the monsters!
High-pressure survival rhythm, every choice you make may affect your strategy against the next wave of enemies.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS *: Windows 7, 8, 10, 11
- Processor: Dual Core+
- Memory: 2 GB RAM
- Graphics: 1 GB RAM
- Storage: 1 GB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
Latest news
Patch NotesOfficial
Update v1.0.1
Hello, fellow adventurers! We are the development team behind RIOO, thank you for purchasing our first game! We have received feedback from numerous gamers from all over the world since the release of our first game: RIOO, and we sincerely thank you for your love, support and suggestions for this little project. This time we have good news: Japanese translation have been added into the game! We hope that more adventurers can enjoy our project! We also made some QOL improvements to our project. We hope these changes will bring you a better experience with it! UPDATE v1.0.1: * Japanese localization added * Weapons can be sold by right clicking during preparation * Control hints will display when a new game started * Fixed an issue where monsters changes direction too fast As a new development team, we have many things to learn, we also hope to bring you more joy and inspiration, and hope that you continue to pay attention to and support us. Project Ground ZeroRead full article on Community Announcements (miaomiaomiao)
