
Screenshots

Watch trailer on Steam ↗MOMIBOSU
PenGames · Published by PenGames · Official site ↗
Very Positive — 92% positive (63 reviews) · 16 achievements
Last updated 27 Sept 2026
A boy and a girl with a mysterious weapon drone in their hands embark on an adventurous journey from their small underground village to the vast world of new lands. Enjoy a precision 2D platformer that will challenge you no matter how many times you get hit!
£7.69
£10.99Lowest price we've ever recorded
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Price history
Action · 2025 · More £5 - £15 games
MOMIBOSU challenges you to guide a young duo through an expansive world, armed with a mysterious weapon drone. Experience precision movements and endless adventures from PenGames.
About this game
Gameplay that makes you want to try again and again
You've been beaten, but you'll do better next time. It makes you want to do it one more time!Abundant gimmicks
Something might happen when you bump enemies against each other!Try various things by bumping enemy characters against each other!
Battling with powerful enemies
Hone your technique to defeat fearsome boss characters!Boss characters are not only human. There are also monsters!
Various enhancement items
Powering up with items is important for fighting fearsome enemies!
A vast map with plenty to explore
Adventure from a small village in the depths of the earth to a new world!
Adventure Story
The story is like a road movie in which the main characters, a boy and a girl from a small underground village, suffer, rejoice and experience many things on their journey to a new landCan the adventure that began in search of hope come to a wonderful end...?

System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: windows10,11(64bit)
- Processor: Intel Core i5
- Memory: 8 GB RAM
- Storage: 2 GB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: windows10,11(64bit)
- Processor: Intel Core i5 or better
- Memory: 16 GB RAM
- Storage: 2 GB available space
Supported Languages
Latest news
AnnouncementsOfficial
"ULTRA0" is Out Now! Launch Sale is Live!
Thank you so much for your continued support!Today, Tuesday, June 2, 2026, PenGames' brand-new title "ULTRA0" has officially been released!We are currently running a limited-time launch sale where you can purchase the game at an introductory 10% discount. "ULTRA0" combines a compelling visual novel with easy-to-control pseudo-3D shooting action. Don't miss this opportunity to dive into a whole new world!Read full article on Community Announcements (gcmountaing)AnnouncementsOfficial
[New Release] ULTRA0 Launch Date Confirmed for June 2nd, 2026!
Thank you so much for playing and supporting our games!Today, we have some exciting news to share with all of our wonderful players regarding PenGames' next project.The release date for our upcoming Visual Novel × Casual Shooter game, ULTRA0, has been officially set for June 2nd, 2026!Set in Country N under the threat of giant monsters, this game is a shooter with a heavy emphasis on its visual novel parts, depicting the story of girls standing up against the monsters. Just like our previous work, we are pouring our hearts into development, balancing the difficulty so that anyone can enjoy the story to the very end.We hope you will come witness the girls who stand against the giant monsters in this brand-new journey!▼Watch the latest trailer and add it to your Wishlist here: Adding the game to your Wishlist means the world to us and greatly supports our development team. Thank you for your continued support!Read full article on Community Announcements (gcmountaing)Patch NotesOfficial
Update to Ver1.1.1
Minor bug fixes implemented. Other adjustments made. 軽微なバグ修正実施。その他微調整を実施。Read full article on Community Announcements (gcmountaing)Patch NotesOfficial
Update to Ver 1.1.0
- Fixed a bug introduced when adding warps in Ver. 1.0.4. - Now, you can also jump out of the round object using the jump button. - Added an "Agile Mode" that allows for multiple dashes. This is intended to be similar to an easy mode. If you change DASH to Agile in the config, your stamina will fully recover upon landing. - Ver1.0.4でワープ追加したときに仕込んだバグの修正。 - ジャンプボタンでも丸いやつから飛び出せるようにした。 - たくさんダッシュができるAgileモードを追加。これはイージーモードみたいな扱いかと思っています。ConfigからDASHをAgileに変えると着地時にスタミナが全快するようになります。Read full article on Community Announcements (gcmountaing)Patch NotesOfficial
Update to Ver 1.0.10
Since many players didn't realize that they can view item descriptions by pressing the jump button on the map screen, I added an explanation. マップ画面でジャンプボタンを押すとアイテムの説明を見れることにみんなが気づかないので説明追加。Read full article on Community Announcements (gcmountaing)






