"Under the Blue Horizon" is an idle simulation game. Play while performing other tasks on your computer! Place your own aquarium anywhere on your screen, coexisting with your work, games, and more!



1. Create fish! Fish grow by eating shrimp. Raise various fish and observe diverse species (there are really many different kinds of fish!)

2. Build your own space under the blue horizon! You can turn the byproducts dropped by fish into currency (Aqua!). Collect Aqua to expand the sea, build and place structures!

3. Crawfish and jellyfish are friends who help you! Hire these friends and plan more efficient placements and ways to acquire resources!




4. Special friends provide various functions such as optimization, music, and new buildings! Hire special friends and enjoy diverse features!

5. We provide convenience features! Try intuitive UI with features like zoom in/out, monitor switching, window repositioning, and always-on-top display!