Game Information

Developer: SZ Games

Rating:

4.4/5

Released: April 2024

Last Updated: June 2025

Technology: HTML5 (Unity WebGL)

Platform: Browser

Size: ~15 MB

Plays: 19,851

Mobile Support: No

About Terrarium/Aquarium

Step into the soothing world of Terrarium/Aquarium, a one-of-a-kind free online indie game crafted for creative souls and lovers of vibrant underwater ecosystems. This browser-based sandbox is a true showcase of procedural generation, where every keystroke births a brand new aquatic scene brimming with possibility. Whether you're a hardcore sandbox veteran or a casual gamer craving something unique and relaxing, Terrarium/Aquarium invites you to experience digital serenity like never before.

Created for the aquarium-themed procedural generation challenge on Reddit’s /r/proceduralgeneration, this gem runs seamlessly on your desktop browser—no downloads or clutter, just instant immersion. Hit ENTER and watch as lush aquatic landscapes spring to life, each one completely unique. Marvel as plants, rocks, colorful fish, and fluttering butterflies appear in endless variety, brought to life with vibrant pixel art that pops against customizable color schemes.

But the fun doesn't stop with generation. Flex your creative muscles as you interact in real-time: click anywhere to introduce a delicate butterfly or a playful fish, turning every terrarium into your personal sanctuary. Play with mesmerizing bubbles, shift through soothing color palettes, or expand your view to enjoy the spectacle in fullscreen—total immersion is just a keystroke away. Powered by Haxe and OpenFL, Terrarium/Aquarium delivers buttery-smooth animation and tactile feedback that make every interaction satisfying.

This game is more than just a pretty aquarium; it's a relaxing digital playground that lets you craft living, breathing environments, perfect for unwinding after a hectic day or getting inspired by procedural artistry. Whether you're experimenting with wild color combos, toggling charming bubbles, or watching as creatures swim and flutter in the space you've curated, Terrarium/Aquarium offers peace, beauty, and endless replayability. Dive in and let your imagination flow—one click could change everything.

How to Play

Getting started with Terrarium/Aquarium is a breeze, even if you’re new to procedural sandbox games. Once you launch the game in your browser, your aquatic adventure begins instantly—no sign-up or installation required.

Start by pressing the ENTER key on your keyboard; with each press, a brand-new terrarium or aquarium scene is procedurally generated, offering unique layouts, flora, and fauna with every refresh. Experiment with color schemes using the 'C' key—cycling through palettes to set the perfect mood, whether you want soft pastels or bold contrasts. Bring your underwater haven to life by pressing 'B' to toggle whimsical bubbles, adding both charm and dynamism. Want full immersion? Hit 'F' to switch to fullscreen mode and enjoy every vivid detail in a distraction-free environment.

Gameplay is interactive: click anywhere on the game scene to spawn a new butterfly or fish, watching them animate in real-time as they explore your evolving world. Mix and match butterfly and fish placements to balance your terrarium visually, or just enjoy creating busy, bustling underwater communities. There’s no right or wrong way to play—perfect for creative moods or simple relaxation. Beginners can experiment without fear; simply generate a new world any time or tweak settings on the fly.

Take your time, experiment with all the options, and let your imagination guide you—Terrarium/Aquarium is all about stress-free discovery and creativity.

Controls

mouse

keyboard

Tips & Tricks

Press ENTER repeatedly to explore hundreds of unique terrarium layouts and themes.
Use the 'C' key to toggle color schemes and find your favorite aquarium aesthetic.
Turn on bubbles with 'B' for extra movement and a more dynamic atmosphere.
Click strategically to place butterflies and fish for visual balance and richer scenes.
Switch to fullscreen with 'F' for an immersive, distraction-free creative experience.
Experiment with rapid world generation to discover rare or intricate scene combinations.
Try combining vibrant color schemes with heavy butterfly/fish spawns for eye-catching results.

Game Features

Procedural world generation for endless, unique aquariums
Responsive single-click spawning of vibrant butterflies and fish
Multiple color schemes for customizable ambiance
Interactive bubble effects to enhance relaxation and realism
Easy-to-use keyboard controls for seamless creativity
Built in Haxe + OpenFL for slick animations and smooth performance
Fullscreen toggle for an immersive sandbox playground

Frequently Asked Questions

How do I generate a new aquarium or terrarium?

Simply press the ENTER key while in the game window, and a brand new, procedurally generated scene will appear instantly.

Can I play Terrarium/Aquarium on my mobile device?

Currently, Terrarium/Aquarium is optimized for desktop browsers only and does not support mobile devices.

How do I add more fish or butterflies to my world?

Just click anywhere inside the game scene to instantly spawn a new fish or butterfly—they’ll animate and start exploring your aquarium right away.

Are there hidden features or Easter eggs?

While Terrarium/Aquarium is intentionally minimalist, toggling features in creative combinations or clicking rapidly can lead to surprising visual outcomes—experiment to discover your favorite scenes!