Behind Glass: Aquarium Simulator

Behind Glass: Aquarium Simulator

Released Jan 2025

Create stunning virtual aquariums on your PC! Our advanced 3D engine brings your fish tank to life with breathtaking realism, featuring lifelike fish, plants, decorations, and more. Transform your monitor into a vibrant, living aquarium. Virtual aquascaping has never been easier!

95% positive · 414 reviews
Not yet
Released, but still in active development
High confidence
Active Development
Not yet
Released, but still in active development
High confidence
Active Development

Where to buy

Steam $14.99
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Evaluation

Behind Glass: Aquarium Simulator left Early Access on January 8, 2025. The very next day, the developer posted explicitly: "This is not the end — updates will continue to roll out, with a focus on introducing new content in the future." Since that 1.0 launch, the developer has delivered a steady stream of major content updates: - April 16, 2025: 10 new fish species plus a Round Tank & Jellyfish DLC - July 8, 2025: 20 new fish species plus gravel customization features - November 24, 2025: 11 new fish species - February 16, 2026: 20 new fish species - July 13, 2026: 10 new fish species plus a Decoration Pack DLC This establishes a clear and consistent pattern of substantial updates arriving roughly every 3–6 months. The most recent update landed on July 13, 2026 — just five weeks before today's date of August 19, 2026 — placing us firmly within the established cadence window. Both released DLCs are already shipped, and no specific future content has been formally announced, but the developer's sustained track record and their explicit post-launch commitment to continued updates strongly indicate more content is on the way.
Evidence
Major update adding 10 new fish species and a Decoration Pack DLC with 57 decoration items across 15 groups.
news post · Jul 13, 2026 source content shipped
high
Major update introducing 20 brand-new fish species to freshwater and saltwater tanks.
news post · Feb 16, 2026 source content shipped
high

Content

2 of 2 released · no outstanding content

Media

Details

Developer
Publisher
BitBros Inc
Achievements
11
Platform
Windows, macOS
Controller
—
Steam Deck
Playable
Players
Single-player

About this game

Behind Glass is the ultimate fish-keeping game, designed to deliver a relaxing yet deeply engaging experience for aquarium enthusiasts and casual players alike.

Whether you’re a passionate aquascaper or simply enjoy the calming beauty of underwater worlds, this game offers everything you need to create your dream aquarium.

Explore a vast sandbox environment where you can design stunning 3D aquariums with incredible creative freedom. Choose between freshwater and saltwater tanks, each offering unique challenges and opportunities to showcase your style. With access to over 280 unique fish species, along with crabs, turtles, and axolotls, your tanks will be bursting with life.

Behind Glass stands apart with its immersive water chemistry simulation, allowing players to delve into the science behind aquarium care. Adjust pH, salinity, and other parameters to create the perfect conditions for your aquatic friends. For those who prefer a more relaxed approach, the designer mode offers the freedom to focus on design and aesthetics without any constraints.

Forget about grinding or locked content — everything is available right from the start. From vibrant fish to countless decorations, you’ll have every tool at your disposal to craft aquariums that reflect your imagination.

Dive deep into the game’s features:

  • Instant access to a vast array of decorations, plants, and creatures.

  • Detailed animations and realistic behaviors for fish and aquatic animals.

  • The ability to mix and match species in diverse habitats.

  • A meditative, stress-free atmosphere designed for relaxation.

  • No other fish tank simulation comes close to offering this level of depth and creativity. Whether you’re a beginner or an experienced aquascaper, Behind Glass lets you build, customize, and manage stunning aquariums without limits.

Start your aquascaping journey today and transform your virtual tanks into mesmerizing underwater worlds!

Last evaluated Aug 19, 2026
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