Choose Open At Nine
Choose Open At Nine if it matches what drew you to this matchup. Open At Nine launched in 2023.
Open At Nine vs Oops… I Hooked Up with a Mermaid 🎣😳
Open At Nine and Oops… I Hooked Up with a Mermaid 🎣😳 both land in Simulation, Casual on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both share Simulation, Casual on Steam. Open At Nine (2023) is 3 years older than Oops… I Hooked Up with a Mermaid 🎣😳 (2026). Open At Nine is Deck Playable on Steam Deck; Oops… I Hooked Up with a Mermaid 🎣😳 has no Deck rating yet. No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Which should you pick?
Choose Oops… I Hooked Up with a Mermaid 🎣😳
Choose Oops… I Hooked Up with a Mermaid 🎣😳 if you want an Indie experience. On Steam, it's the newer release (2026) and ships with the modern feature baseline. Oops… I Hooked Up with a Mermaid 🎣😳 launched in 2026.
Both Open At Nine and Oops… I Hooked Up with a Mermaid 🎣😳 sit in Simulation and Casual on Steam, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.
Side-by-side comparison
 Open At Nine |  Oops… I Hooked Up with a Mermaid 🎣😳 | |
|---|---|---|
| Released | 2023 | 2026 |
| Genres | Simulation, Casual | Indie, Simulation, Casual |
| Platforms | Windows | Windows, macOS, Linux |
| Steam Deck | Deck Playable | Unrated |
| Price | 9.99 USD | Price unknown |
| Steam reviews | 82.7% positive (179 reviews) | — |
| Multiplayer | Single-player only | Single-player only |
| Developers | Black Cat Entertainment | Lewd Star |
Side by side
- Both share Simulation, Casual on Steam.
- Open At Nine (2023) is 3 years older than Oops… I Hooked Up with a Mermaid 🎣😳 (2026).
- Open At Nine is Deck Playable on Steam Deck; Oops… I Hooked Up with a Mermaid 🎣😳 has no Deck rating yet.
Open At Nine vs Oops… I Hooked Up with a Mermaid 🎣😳 — FAQ
- Should I play Open At Nine or Oops… I Hooked Up with a Mermaid 🎣😳 first?
- If you want chronology, Open At Nine (2023) came out before Oops… I Hooked Up with a Mermaid 🎣😳 (2026). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are Open At Nine and Oops… I Hooked Up with a Mermaid 🎣😳 similar?
- They overlap on Simulation, Casual on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.
- Does Open At Nine run on Steam Deck?
- Yes — Open At Nine is rated Deck Playable by Valve. Oops… I Hooked Up with a Mermaid 🎣😳 doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.