SECONDBRAIN has five chapters. The fifth one, 《岸》 — The Shore — is a dry landscape garden where an old man sits on the veranda and watches rain fall while the wind blows sideways. I wrote it, I drew every stone in it from photographs I took myself, and I spent more nights on its rain than on any other part of this game.
It was never meant to stay mine.
This release is the part where I hand it over.
What is in this release
A Chapter 5 that starts immediately. A standalone edition that opens straight into the garden — press A at the title and you are there. No chapter select, no four chapters to replay first. If you only want the place, you can have the place.
A method, not just a file. The way this game is built — 160×144, four shades of green, one HTML file with no build step and no external assets — is now packaged as a Skill you can hand to an AI. It carries the constraints, the art rules, and the shape of the data. You describe your own fifth chapter; it helps you build one that runs.
Everything else stays where it is. Chapters 1–4 are untouched and will remain untouched. They are sealed: the build checks its own contents while it runs, and a copy whose first four chapters have been altered says so on its own title screen. That is not a lock — anyone determined can remove it. It is a signature, so a modified version can tell you honestly what it is.
Why give away the ending
The theme of this game is memory. The line it ends on is that memory is the most valuable thing anyone owns.
I kept writing a fifth chapter out of my own memories and then realising that this was exactly the wrong way round. A game about memory, filled entirely with mine, asks you to look at someone else's photographs. The complete version of SECONDBRAIN is not the one I finish. It is the one where you delete my Chapter 5 and put yours in its place.
So: delete it. The garden is a placeholder that happens to be finished.
One thing that nearly went wrong
To make the standalone Chapter 5 edition, the obvious move was to delete chapters 1–4 from the file. Smaller download, cleaner build.
It would have broken the game's own signature. The integrity check reads the chapter 1–4 story data; delete it and every single copy of the standalone edition would have announced MODIFIED BUILD on its title screen — my own release, calling itself a forgery, on every player's screen.
So I did the opposite of the obvious thing: I left all the data in place and cut only the entrance. Twelve small patches, each one asserted against exactly one anchor in the source. The seal value came out unchanged, which is how I knew it had worked.
There is a leftover from this that I am choosing not to fix. The memory machine in Chapter 5 still says "it's still empty in here" — because its gallery only collects snapshots from chapters 1–4, and in this edition you never play them. It is technically a blank screen caused by a missing feature. It also happens to be the truest line in the build.
How to start
- Play the full game: https://evernotebot.itch.io/secondbrain
- Chapter 5, and the Skill for writing your own: https://evernotebot.itch.io/secondbrain-chapter5
- The long version of the method: https://note.com/evernotebot/n/n9b495e4b5204
Three languages, Chinese / English / Japanese, switchable at any moment. There is a read-aloud mode if you would rather not look at the screen.
If you do build your own fifth chapter, I would like to see it. That is not a formality — I have no idea what anyone else's shore looks like, and I would like to.
My project: https://evernotebot.itch.io/secondbrain
