AquaSim
AquaSim
WISHLIST on >>AquaSim Steampage<<

AquaSim is a cozy, living aquarium that stays with you while you use your computer.
No stress. No pressure. Just a peaceful world quietly evolving on your screen

Unlike traditional idle games, AquaSim is designed as a desktop companion, something you don’t “play” constantly, but something that lives alongside you.
Study, work, or relax while your fish grow, interact, and create a living ecosystem in real time.

What is AquaSim?
Take care of your aquarium at your own pace:
• Feed your fish and watch them grow
• Clean and maintain water quality
• Decorate your tank with meaningful items
• Discover new species and rare variations
• Observe natural behaviors, interactions, and breeding

Key Features
- Real-Time Simulation
Breeding
Fish reproduce with variation, creating unique and rare outcomes135+ Decorations
Some objects aren't just visual, they affect oxygen, temperature, happiness, and ecosystem balanceBestiary Collection
Track species, discover variants, and complete your aquatic collectionOrganic Progression
No forced missions, it gently rewards curiosity and care.
Your aquarium continues evolving even when you're not actively playing.

Perfect for students, developers, designers, streamers, or anyone who wants a living piece of calm on their desktop.
Current Version (Demo - V0.1.7)
More species, minigames, and deeper ecosystem features are coming soon.
Future Plans
- Steam release (paid base game + cosmetic DLCs)
- More creatures (predators, abyssals)
- Expanded story elements and events
Thank you for checking out AquaSim!

Important Note:
Download the Windows version below to use AquaSim as a true desktop companion, a floating, always-visible aquarium that stays with you while you use your PC. <3
| Status | In development |
| Platforms | HTML5, Windows |
| Author | Heaven Machine |
| Genre | Simulation |
| Made with | Unity |
| Tags | aquarium, aquasim, Cozy, Desktop Pet, Idle, Pixel Art, Relaxing, Sandbox, Virtual Pet |
| Average session | A few hours |
| Languages | English |
| Inputs | Mouse |
| Accessibility | One button |
| Content | No generative AI was used |
Download
Click download now to get access to the following files:
Development log
- AquaSim — Devlog #11 Update V0.1.880 days ago
- AquaSim — Devlog #10 Update V0.1.7Apr 06, 2026
- AquaSim — Devlog #9 Update V0.1.6Mar 18, 2026
- AquaSim — Devlog #8 Update V0.1.4Feb 21, 2026
- AquaSim — Devlog #7 Update V0.1.3Feb 19, 2026
- AquaSim — Devlog #6 Update V0.1.0Feb 08, 2026
- AquaSim — Devlog #5 Update V0.0.9Feb 04, 2026
- AquaSim — Devlog #4 Update V0.0.8Feb 04, 2026

Comments
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That is beautiful! A lot of work in there definitely
I wonder, is it accurate in terms of food to fish relation? I have no idea about the fish but if it is not random it is twice as cool :D
Thank you!!
Yeah, it’s actually not random at all 😄
I tried to make the food system loosely reflect real-life feeding behaviors, so different species have preferred food types depending on how they behave in nature.
For example:
So while it’s simplified for gameplay, there is logic behind it. ❤️
I wanted it to feel cozy and accessible, but still have that “oh, this actually makes sense” moment 🙂
That's so cool! I love it. I think it is a great game for aquarium lovers :)
Someone just donated 2 dollars! Thank you, you are the greatest person in the world! <3
Looks cool 👏🏻👍🏻
Thank you! <3