Single-player games like Mermaid Aquarium
Below are 11 single-player Steam games similar to Mermaid Aquarium, 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 Mermaid Aquarium page.
Ranked picks
- 1
Idol Hands
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Simulation and Casual with Mermaid Aquarium.
Uesugi Wakari, the ex-member of an idol group, was kicked out after a masturbation video leak. How will you rebuild her dream and turn her into a superstar? Your hectic journey (and nasty fun) has begun! With 30+ pornos, 400+ pics, 20+ outfits, and more, Idol Hands will blow your... (Cough)... mind!
- 2
Sleepover: reWake
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Simulation with Mermaid Aquarium.
Sleepover: reWake is a Gay Adult/Yaoi Visual Novel featuring the story of Kano and Aki, two best friends who have drifted apart over the years. Help Kano navigate the two’s changed relationship, and create a special bond with Aki to last forever. One night is all it takes!
- 3
Lovey-Dovey Lockdown
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Simulation and Casual with Mermaid Aquarium.
You and your former college crush have been locked in a room through divine intervention. The only way out is for you to…
- 4
Kon's Lesson!
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Casual with Mermaid Aquarium.
She was sealed for a thousand years… but now she’s living with you! Fulfill your contract with her by completing her lessons and feeding her “energy” in this cute ‘n steamy romantic comedy game!
- 5
JASON, Coming of Age
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Simulation with Mermaid Aquarium.
Play as a young man of 25 exploring love, temptations, and the mysterious power of attraction he possesses. Dive into an erotic, intense, and unpredictable world where every choice you make will shape your destiny.
- 6
Swaying Girl
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Casual with Mermaid Aquarium.
这是一个交互性小说的游戏，包含多个独立的小故事。画面精美，操作简单。
- 7
Hard Times at Sequoia State Park
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Casual with Mermaid Aquarium.
An erotic visual novel, join Chloe as she starts her first day on the job as a park ranger! Sequoia State Park is filled with fresh air, bears, and girls who love massive wood!
- 8
Scarlet Hollow
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Casual with Mermaid Aquarium.
Your aunt’s dead, your cousin hates you, and you’re stuck in the dead-end town of Scarlet Hollow. Choose your path through a branching narrative so dense that you'll see less than 1/5 of the game on a single playthrough. You won't be able to save everyone. Good luck, and welcome home.
- 9
Erotic Clicker
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required. Shares Casual with Mermaid Aquarium.
Erotic Clicker is an adult casual idle clicker. Every tap advances character stages, unlocks animated CGs and gallery rewards. Upgrade your click efficiency, accumulate Desire Points, and gradually expand your collection of beautiful heroines 💘
- 10
Forbidden Scrolls : Midnight Whispers
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required.
Beautiful demonesses, forbidden night tales, deckbuilding ❤️🔥 Adult strategy card game in eerie Chinese cultivation fantasy. Collect Ghost/Demon/Immortal/Fox cards, upgrade moves, treasures and relics, challenge alluring yokai beauties in a haunted temple, and unlock their secrets.
- 11
Lustflame Bonsai
Single-player alternative to Mermaid Aquarium — playable solo, no multiplayer required.
Adult xianxia farming RPG. Cast out of the Sword Sect, you inherit a ruined mountain gate and one spiritual field. Farm, craft pills, take commissions, delve into mystic realms, and pursue exclusive routes with five heroines. The sect is a bonsai; who shares your nights is up to you.