Create your very own aquariums on your PC with Behind Glass. With our realistic 3D aquarium engine, you can enjoy the details of lifelike fish, plants, decorations, algae, and more. Add realistic water and lighting effects and your monitor becomes a fish tank. Virtual aquascaping is so easy!
All Reviews:
Very Positive (244) - 96% of the 244 user reviews for this game are positive.
Release Date:
Aug 25, 2021

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We want to find out what kind of final product the majority of our players is looking for:
Is it a game like our Fish Farm series for mobiles? Is it another kind of game, for example, involving elements of strategy or tycoon games, etc?

It might also be the case that the "creative mode" available now is all what the audience is waiting for and traditional game elements are not needed at all. In this case, do players actually prefer to simply build beautiful tanks without worrying about, e.g., water parameters and water chemistry? Or is it a more realistic approach, simulating various real-life aspects of a fish tank, what is wanted by the community?”

Approximately how long will this game be in Early Access?

“As we are not certain what in-game aspects our audience is actually looking for, this is hard to project. Considering about one year is the best guess we can give as of now.”

How is the full version planned to differ from the Early Access version?

“We will certainly add more species, decorations, and aquarium types. An improved light configuration was added with the first update. There might be a simulation of water currents inside tanks. Depending on the player responses, there will either be more game-like or more simulation-like additions. UPDATE: We now include a simulation mode, letting you configure various equipments, involving growing plants, fish, and algae, as well as simulating water chemistry.

We will enable cross-breeding of fish. Even if this is not possible in real life, this is an option users can enjoy on their PC. UPDATE: Cross-breeding is now available.

We might be able to make each fish unique in shape and texture, even fish from the same species. This needs to be carefully considered though, as to the large amount of work involved in this and the performance impacts it will have.

We might add gender differences. This would basically double the amount of work on our side for each supported species. Whether this will be realised strongly depends on game success and player needs.”

What is the current state of the Early Access version?

“This version offers a fully operational Aquarium Simulator and Editor (allowing you to aquascape your tanks, as well as to simulate water chemistry and to configure equipment) with a still limited amount of 80 species of fish/crabs (now increased to 193 species). Cross-breeding and recoloring added in the meantime allows for an unlimited number of fish :-)”

Will the game be priced differently during and after Early Access?

“When leaving Early Access, the price will be higher than it is now -- Early Access consumers will thus both be able to shape the final product and to pay a lower price.”

How are you planning on involving the Community in your development process?

“We will be checking the Steam Forums regularly where you can post feedback, ideas, suggestions, bug reports, and the like. We will reply on there, but the Steam Forums are most likely not the best place for longer and fruitful discussions.

We will also be using a Discord server to chat, share progress, and probably have detailed discussions:

Get in touch on Facebook:

Get in touch via e-mail:

Get in touch while playing: Use the Open Player Support button in the Settings menu.

Please always bear in mind that the time we spend communicating reduces the time we can spend to actually realise and implement the things we learnt from communicating -- we are just a small team; no communications officer involved here. Your advantage: your feedback is heard by the right persons.

If anyone is actually interested and able to help us with anything apart from "things that need to be done by the creators", feel free to get in touch! Not sure what this could be right now (apart from localising the game), but if you are the right person, you can surely tell us...”
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About This Game

Design, scape, simulate and enjoy your very own aquariums on your PC with Behind Glass: Aquarium Simulator.

Powered by our latest 3D aquarium engine, you can easily set up and enjoy the details of lifelike fish, crabs, plants, decorations, algae and more. Topped off with realistic 3D effects, you may not be able to tell the difference between your monitor and a real aquarium.

Just take a look at the screenshots and videos - these aquariums are all set up with Behind Glass: Aquarium Simulator.

Use the windowed mode to enjoy your aquariums all the time on your primary or secondary screen. We have included some beautiful sample aquariums to get you started and give you some inspiration. Use the Steam Workshop to show off your virtual creations and visit other aquariums.

We currently offer 193 species of fish/crustaceans (freshwater and saltwater) and various decorations. We have also added a crossbreeding lab, which allows you to create an 'unlimited' number of hybrid fish species and recolour all your fish. More and more content will become available with our regular updates.

Behind Glass currently features a Designer Mode and a Simulation Mode. The designer mode allows you to create your favourite tanks without the constraints of the real world. The simulation mode includes water chemistry, plant growth, fish growth and algae growth, as well as various equipment to set up.

Help us shape the future of Behind Glass by giving us your feedback via the Steam forums, our Discord, or by email. You can actually have a major influence on our future development efforts! To keep aquarists happy, we need the input of expert aquarists!

System Requirements

    • OS: Windows 10
    • Processor: Dual core
    • Memory: 4 GB RAM
    • Graphics: Nvidia GeForce GTX 970 / AMD RX480
    • DirectX: Version 11
    • Storage: 2 GB available space
    • OS: Windows 10
    • Processor: Quad core
    • Memory: 8 GB RAM
    • Graphics: Nvidia GeForce GTX 970 / AMD RX480
    • DirectX: Version 11
    • Storage: 2 GB available space
    • OS: Catalina 10.15
    • Processor: 2.2 Ghz intel core i7
    • Memory: 4 GB RAM
    • Graphics: Radeon Pro 460
    • Storage: 2 GB available space
    • OS: Catalina 10.15
    • Processor: 2.2 Ghz intel core i7
    • Memory: 8 GB RAM
    • Graphics: Radeon Pro 460
    • Storage: 2 GB available space

What Curators Say

7 Curators have reviewed this product. Click here to see them.

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