Single-player games like The World of a Mermaid
Below are 8 single-player Steam games similar to The World of a Mermaid, 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 The World of a Mermaid page.
Ranked picks
- 1

Run Run Boy
Single-player alternative to The World of a Mermaid — playable solo, no multiplayer required. Shares Sports and Indie with The World of a Mermaid.
Run Run Boy game is a casual game based on the idea to run as fast as possible and so that no one can catch you.
- 2

Cruise Control Mode On!
Single-player alternative to The World of a Mermaid — playable solo, no multiplayer required. Shares Sports and Indie with The World of a Mermaid.
This is about adrenaline.
- 3

Waves Running Simulator
Single-player alternative to The World of a Mermaid — playable solo, no multiplayer required. Shares Sports and Indie with The World of a Mermaid.
Have you seen the enormous waves destroying the planet? If not, you are in the right place! In Waves Running Simulator you have to escape from the tsunami as fast as possible.
- 4

Long Way
Single-player alternative to The World of a Mermaid — playable solo, no multiplayer required. Shares Sports and Indie with The World of a Mermaid.
Long Way is an immersive arcade driving simulator with diverse vehicles and customization options. Dynamic day-night cycles and weather conditions create a realistic atmosphere. Explore mountain roads, deserts, forests, and cities. LAN Multiplayer mode supports up to 8 friends for added excitement.
- 5

Roxy Raccoon 2: Topsy-Turvy
Single-player alternative to The World of a Mermaid — playable solo, no multiplayer required. Shares Sports and Indie with The World of a Mermaid.
Roxy Raccoon 2: Topsy-Turvy is a Tilt Maze/Labyrinth style like no other. Play through the next chapter in the Roxy Raccoon Saga, compete in various game modes and customize & create your own levels, then share them with the world!
- 6

Orion Blue
Single-player alternative to The World of a Mermaid — playable solo, no multiplayer required. Shares Sports and Indie with The World of a Mermaid.
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.
- 7

Blackhole on the Road
Single-player alternative to The World of a Mermaid — playable solo, no multiplayer required. Shares Sports and Indie with The World of a Mermaid.
Blackhole on the Road is a thrilling game that puts you in control of a powerful black hole as you compete against others to become the largest and most powerful in the city.
- 8

HRD 3 Pegasus Island
Single-player alternative to The World of a Mermaid — playable solo, no multiplayer required. Shares Sports and Indie with The World of a Mermaid.
Explore the Caribbean open world of Pegasus Island. Complete racetracks, tame horses, build stables, complete quests, find treasure and fly over the island in your very own Pegasus.