Single-player games like Moon Fishies
Below are 8 single-player Steam games similar to Moon Fishies, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Moon Fishies page.
Ranked picks
- 1
Cozy Island Idle
Single-player alternative to Moon Fishies — playable solo, no multiplayer required. Shares Indie and Simulation with Moon Fishies.
Cozy Island Idle is a chill fishing idle game where you catch all sort of fantasy fishes to showcase them in an Aquarium to sell them to turn a profit and customize your aquarium and island.
- 2
Joyquarium
Single-player alternative to Moon Fishies — playable solo, no multiplayer required. Shares Indie and Simulation with Moon Fishies.
Joyquarium is a relaxing casual fish-raising game. Buy various cute fry and sell them at a high price after they grow up. With the money you earn, you can purchase aquatic plants, driftwood, scenery stone, etc. to decorate your tank (you can freely adjust the color, size, and position).
- 3
Desktank
Single-player alternative to Moon Fishies — playable solo, no multiplayer required. Shares Indie and Simulation with Moon Fishies.
A cozy idle aquarium that lives on top of your screen. Watch fish swim, grow, and interact while you work or relax. Desktank turns your desktop into a peaceful underwater world — float it in the corner or let it take over the whole screen. Just sit back and enjoy the calm.
- 4
Orion Blue
Single-player alternative to Moon Fishies — playable solo, no multiplayer required. Shares Indie and Simulation with Moon Fishies.
Orion Blue is a cozy fishing adventure set on a beautiful alien planet. Catch fish, gather resources, and build relationships with the locals. Play actively, or relax and let the game progress with Idle Mode.
- 5
AquaFantasia
Single-player alternative to Moon Fishies — playable solo, no multiplayer required. Shares Simulation and Casual with Moon Fishies.
AquaFantasia is an engaging and soothing idle game. Begin your aquatic adventure by purchasing a variety of small fry, raise and sell them. You can customize fantasy oceans with rare fishes to create your own aquarium.
- 6
Tiny Aquarium: Social Fishkeeping
Single-player alternative to Moon Fishies — playable solo, no multiplayer required. Shares Indie and Simulation with Moon Fishies.
A happy aquarium that lives at the bottom of your screen! Tiny Aquarium is a social idle simulator that keeps growing, even when offline. Hatch, sell fish, decorate, go fishin’, and visit your friends’ aquariums with bite-sized daily sessions.
- 7
Chillquarium
Single-player alternative to Moon Fishies — playable solo, no multiplayer required. Shares Simulation and Casual with Moon Fishies.
Chillquarium is a cozy and relaxing idle game. Buy fish and raise them in real time, then sell them to turn a profit! Customize your aquarium as you progress from a simple starter tank to your dream setup by filling your collection with rare exotic fish and ultra-rare color variants!
- 8
Megaquarium
Single-player alternative to Moon Fishies — playable solo, no multiplayer required. Shares Indie and Simulation with Moon Fishies.
The public aquarium simulator. Design your displays, look after your fish, manage your staff and keep your guests happy! It's all in a day's work as the curator of your very own Megaquarium.