Screenshots
Watch trailer on Steam ↗RONNARIUM
ハルナノミウチ · Published by ハルナノミウチ
Positive — 100% positive (31 reviews) · 6 achievements
Last updated 27 Sept 2026
An aquarium where a huge tank called "RONNARIUM" is on display. There is a rumor that if one enters the aquarium at night, he or she will be "divinely bewitched". A girl named "Yocto" hears the rumor and visits the aquarium to confirm the truth.
£1.69
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Price history
Adventure · 2023 · More under £5 games
Explore the enigmatic RONNARIUM, an adventure game where a girl named Yocto investigates a supernatural rumor about a massive aquarium. Will you be divinely bewitched?
About this game
There is a rumor that if one enters the aquarium at night, he or she will be "divinely bewitched".
A girl named "Yocto" hears the rumor and visits the aquarium to confirm the truth.
summary
It is a game to investigate and explore the aquarium.
Let's hear the truth of the rumor from the creatures and get the key to the room that will give you a clue.
This game is a "multi-end" where the outcome changes depending on your choices, and there are two endings.
Features
- Dot-drawing 2D adventure game.
- The story takes place in an aquarium.
- Exploration extends to the back side of the aquarium.
- Talk to the creatures and investigate the things that interest you as you move forward.
- It is also possible to chat and interact with accompanying characters.
- Basic operations are moving, examining (speaking).
- Sometimes mystery solving and shooting elements?
- 2 endings
Distribution Terms
.You are welcome to distribute and post videos using footage from this game.
You are also welcome to monetize your work.
System Requirements
Will my PC run this? →Minimum
- OS:
- Memory: 4 GB RAM
- Storage: 500 MB available space
Supported Languages
Latest news
AnnouncementsOfficial
Regarding Unity Vulnerability (CVE-2025-59489)
We have updated our game to address the recently disclosed Unity vulnerability (CVE-2025-59489), as announced by Unity Technologies: https://unity.com/ja/security/sept-2025-01Our game was affected by this issue, so we have taken the necessary steps to apply the fix. Please note that this update does not include any changes to the game's content.If you notice anything unusual or have any concerns, feel free to contact us. We appreciate your continued support.Read full article on Community Announcements (ハルナノミウチ)Patch NotesOfficial
Bugs reported by users have been fixed.
Bugs reported by users have been fixed. If you find any bugs or problems in the future, we would appreciate it if you could report them to us. X: https://twitter.com/harunanomiuchi Email: contact@harunanomiuchi.jpRead full article on Community Announcements (ハルナノミウチ)
