Single-player games like Oops… I Hooked Up with a Mermaid 🎣😳
Below are 15 single-player Steam games similar to Oops… I Hooked Up with 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 Oops… I Hooked Up with a Mermaid 🎣😳 page.
Ranked picks
- 1
Open At Nine
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Simulation and Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
“Massive debt, a shabby brothel, and a naughty succubus… This is all I get for defeating the Demon God?!” Hire monster girls to attract customers and pay off your debts! Don't forget to give your girls lots of hands-on job training!
- 2
Her New Memory - Hentai Simulator
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Indie and Simulation with Oops… I Hooked Up with a Mermaid 🎣😳.
One day, you find a shivering, barefooted girl in ragged clothes knocking on your door. She has no recollections of her past, and she doesn’t even remember her name. You can help her recover her memories or let her stay at your side forever.
- 3
My Waifu's Stream is Going Viral ‼️😳
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Indie and Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
My Waifu's Stream is Going Viral ‼️😳 is a narrative-driven webcam simulator with dating sim elements and a light NTR vibe. Manage your girlfriend’s streams, react to donations, grow the channel, and see how fame affects your relationship. 🔞
- 4
Hyperborea: Hornysolation
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Indie and Simulation with Oops… I Hooked Up with a Mermaid 🎣😳.
The sequel to “Humans are no that against Lizardwomen” in Hyperborea 2020: stuck in quarantine during the pandemic, the hero finds a live lizard in the wall, with which he will share his loneliness.
- 5
OnlySluts: WAIFU MATCH 💖
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Indie and Simulation with Oops… I Hooked Up with a Mermaid 🎣😳.
Become an intern at an adult magazine, filter sexy photos and flirt with colleagues in chat. Your choices unlock hot scenes, every waifu hides secrets… and yes, OnlySluts: WAIFU MATCH 💖 can be played with just one hand!
- 6
Happiness Double Room
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Indie and Simulation with Oops… I Hooked Up with a Mermaid 🎣😳.
It's the end of summer, and you've been abducted by a sister you've known for a long time. Forget all your past troubles, distress and everything bothersome, just spend your time happily with Sister in the days to come!
- 7
Office Is My Harem🔞
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Simulation and Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
After being unreasonably criticised by your manager, you decided to fight back. Unexpectedly, this attracted your female colleagues. Could it be that a chance to fulfill your fantasy of having a workplace harem? This visual novel & Idler game has a readily story rhythm and lots of erotic scenes.
- 8
Sunrider Academy
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Indie and Simulation with Oops… I Hooked Up with a Mermaid 🎣😳.
You are Kayto Shields, an ordinary man thrown into an extraordinary adventure. Control Kayto's day to day life as well as his responsibilities as club manager in this stat management sim.
- 9
SEX Guild Simulator ⚔️🔞
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Simulation and Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
Build the hottest pleasure guild in the kingdom! As a lucky tavern owner, attract sexy heroes, upgrade your rooms, and dive into spicy adventures. An adult visual novel where you can play with one hand… when the other is busy 😉
- 10
SEXOPHOBIA 🔞
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Simulation and Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
A dating sim and card-based social strategy game where everyday life collides with the unknown. Build relationships, craft your deck, and uncover a hidden reality where every connection shapes your path—and your fate.
- 11
Femboy Futa Mania 🌶️
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Indie and Simulation with Oops… I Hooked Up with a Mermaid 🎣😳.
Turn-based 1v1 wrestling with stats, training, and spicy 18+ vibes. Fight femboys and futa rivals, manage energy, hit the gym, and use seduction skills to climb a no-rules tournament packed with sexy surprises.
- 12
WANTED: Wild Sluts 🔞
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
Hunt down a gang of gorgeous outlaw babes in this Wild West erotic adventure. Capture them, “rehabilitate” them your own way, and decide who ends up in control — you or the wildest girls on the frontier. Choices, danger, and hot 18+ scenes await. 🤠🔥
- 13
SQUAD XXX: Slut Hunt 🚨
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Simulation and Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
Adult cyberpunk visual novel with squad management. Lead a special ops team, control chaos in a city overrun by mutated implant-addicts, capture suspects, upgrade agents, and uncover a cult merging tech, lust, and mind-control.
- 14
Monster Girls: You Can't Say No 🔞
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Simulation and Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
Adult adventure set in a monster college where desire is survival. Host an incubus, manage rising “heat,” flirt, and build relationships to stay alive. Explore, upgrade abilities, and unlock scenes in a mix of dating sim and resource management. 🔞
- 15
Sisters in Sin 🔞
Single-player alternative to Oops… I Hooked Up with a Mermaid 🎣😳 — playable solo, no multiplayer required. Shares Simulation and Casual with Oops… I Hooked Up with a Mermaid 🎣😳.
Sisters in Sin is an adult visual novel where you play as the Demon of Lust disguised as a preacher. Manipulate schedules, uncover hidden desires, corrupt sacred vows, and turn a holy monastery into a place of temptation. 18+