Underplayed Gems

Behind Glass: Aquarium Simulator (2025)

Behind Glass: Aquarium Simulator cover
Developer
BitBros Inc
Platforms
Windows, macOS
Genres
Casual, Indie, Simulation
Rating
4.7 of 5, 409 player ratings
Typical playtime
about 5.4 hours
Where to get it
Steam
The 3D catalog: game boxes on wooden shelves, with the cat sitting at the counter next to its greeting.

The catalog in 3D

The same catalog has a room you can walk around in. The cat behind the counter is the AI Catbot, and they pick real games from it when you tell them what you feel like playing. Nothing is for sale, here or in there. Go in from here and this game is already out on the counter, with more like it waiting on the shelf next to it.

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How it feels

A gentle, hands-on fish-keeping sandbox that invites creative relaxation while building and observing a peaceful underwater world.

relaxingcalmingcreativeimmersivemeditativefamily friendlyeducationalidle

What players say

Players praise the realistic fish behavior and the ability to breed fish. They love the axolotl and jellyfish DLC, but many want shrimp, snails, and more tank decorations. Some find the tanks too restrictive even in sandbox mode.

Screenshots

Behind Glass: Aquarium Simulator screenshot 1Behind Glass: Aquarium Simulator screenshot 2Behind Glass: Aquarium Simulator screenshot 3Behind Glass: Aquarium Simulator screenshot 4Behind Glass: Aquarium Simulator screenshot 5Behind Glass: Aquarium Simulator screenshot 6

More games like this

This page is from Underplayed Gems, a catalog of older and overlooked games. Not quite it? You can browse by platform and genre, or take this one into the 3D catalog and ask the Catbot for something closer.