Twine
Sunfish City
Sunfish City is a trait swap sandbox built in Twine, and like Hinsdale Days its platform list contains one entry: HTML5. There is no build to download. It is also the most transparent game in this batch about how it was made, and that deserves saying up front.
Plays online. The developer hosts it, you click and you are in. Checked on 2026-08-11.
- Developer
- Grankor
- Engine
- Twine
- Released
- 2024
- Price
- Free to play
- Runs in a browser
- Yes, hosted online
Does it run in a browser
Yes, exclusively. HTML5 is the only platform listed, so the browser is the whole delivery method.
The developer lists mouse and touchscreen as inputs, with no keyboard requirement, which puts it in our mobile list. A text game that expects only taps is close to the ideal shape for a phone.
Development is fast. When we checked, the page had been updated within the previous day, and the title itself carries a version number that moves regularly.
What you actually play
Interactive fiction, tagged sandbox, experimental, transformation and gender bender. The trait swap idea in the title is the mechanic rather than the theme: things move between characters and the game tracks the consequences.
It holds a 3.9 out of 5 from 129 ratings, which is the lowest average in this batch. We are not going to dress that up. An experimental sandbox in active development divides people, and a game that changes weekly gets rated at many different states of completeness.
Sessions run about an hour.
The AI disclosure, in full
itch.io asks developers to declare generative AI use, and this developer has declared it across three areas: code, graphics and text.
We are reporting that plainly because it is a fact on the game's own page, because some players care a great deal about it, and because a site that claims to check things does not get to report only the flattering findings.
What you do with it is your call. It does not stop the game running in your browser, and it has not stopped 129 people rating it.
What a weekly update cycle does to a browser game
A game that updates this often behaves differently from a finished one, and the browser makes the difference sharper.
On the upside you are always current. There is no download to re-fetch and no version to compare against anything, you simply load the page and get the newest state.
The cost lands on your saves. A sandbox in heavy development changes its own variables, and a save written against last month's structure does not always survive. On a browser game, where saves live in storage you do not really control, that is worth knowing before you invest twenty hours.
The practical habit is the same one that applies to every Twine game here. Export a save to a file when you reach somewhere you would hate to lose. It costs ten seconds.
Sunfish City, answered
Is Sunfish City free?
Yes, and browser only. HTML5 is the only platform the developer lists.
Does it work on a phone?
Yes. The developer lists mouse and touchscreen as the inputs, with no keyboard needed, which is why it is in our mobile list.
Was AI used to make this game?
Yes, and the developer says so openly. The itch.io disclosure covers code, graphics and text.
Why is the rating lower than the other games here?
It sits at 3.9 out of 5 from 129 ratings. It is an experimental sandbox still in development, which divides opinion, and a game that updates weekly collects ratings from many different versions of itself.
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Sunfish City sits in Text Based Porn Games along with everything else we have checked. If you are on a phone, the mobile page filters the catalogue down to what genuinely works in your hand.