Co-op games like The One Fish
Below are 8 cooperative Steam games similar to The One Fish, ranked by player overlap and content similarity. Every pick supports cooperative play — online co-op, LAN co-op, or shared/split-screen — so you can play with friends right out of the box. imho.run pulls from the same Steam category data Valve uses internally, so "Co-op" here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like The One Fish page.
Ranked picks
- 1
My Beautiful Aquarium
Online Co-op alternative to The One Fish — playable with friends. Shares Indie and Casual with The One Fish.
A fish tank that lives on your screen. Real species, and every fish is an individual you can name. In Cozy mode nothing can die, so you can leave it running all day. Challenge mode is proper fishkeeping: water types, breeding, sickness, mistakes. Play it, or just let it swim.
- 2
Master Stacker: Tower Trials
Online Co-op alternative to The One Fish — playable with friends. Shares Indie and Casual with The One Fish.
Master Stacker: Tower Trials is a physics-based 3D puzzle balance game. Place awkward objects, read the center of mass, and survive tense wobbling towers in solo challenges or in player vs. player online matches.
- 3
A Game About Penguins: First Catch
Online Co-op alternative to The One Fish — playable with friends. Shares Indie and Casual with The One Fish.
A free prologue to the cozy penguin sandbox. Fish, slide, and explore a snowy island with friends. Catch 30 sea creatures, play arcade games, customize your penguin, and cause a little harmless chaos along the way.
- 4
Multicellular
Online Co-op alternative to The One Fish — playable with friends. Shares Action and Indie with The One Fish.
Multicellular will take you back in time, to the dawn of life. Build your multicellular organism and combat hunger, the environment, darkness and other organisms. Everything in this new world can kill you, will you be able to survive?
- 5
Acting Out
Online Co-op alternative to The One Fish — playable with friends. Shares Action and Indie with The One Fish.
Make movies with your friends! Acting Out is an online co-op multiplayer game where you film movie scenes. Choose scripts from different genres and cast your actors, then its lights, camera, action! Hit your marks, deliver award-winning performances, then watch your masterpiece on the big screen!
- 6
OUTSIDE
Online Co-op alternative to The One Fish — playable with friends. Shares Action and Indie with The One Fish.
DARES REALITY GAME SHOW — WITH CAMERAS, NEIGHBORS, AND ESCALATION. Your friends dare you. Then lie, sabotage, and bet on your failure. Fail a dare and you’re sent OUTSIDE — escalating into strangers, neighbors, or real-world dares on camera (optional, phone supported).
- 7
Last Button
Online Co-op alternative to The One Fish — playable with friends. Shares Action and Indie with The One Fish.
Press the button. Something horrible happens. Last player standing wins. 2–8 players. Zero rules. Pure chaos.
- 8
Wild Wild Eden
Online Co-op alternative to The One Fish — playable with friends. Shares Action and Indie with The One Fish.
Survive a primitive fantasy world in Wild Wild Eden, an open-world survival crafting game where monsters are family. Pet, feed, and protect your companions. As a tribal chief, raise your monster friends, build a thriving base, and explore a harsh yet heartwarming world together.