All you need to do is switch to HTML mode, then add a <details> tag with another <summary> tag to say what it's about and then any other tags inside to hide.

Example:

<details>

<summary>Game Walkthrough</summary>

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

</details>

Thank you.

cool!

how to change back to normal text? all i write beneath the spoiler becomes the spoiler too. I thought i closed it with  </details>

this is interesting and want to try

testing

Goota check it

This doesn’t appear to work when commenting on peoples’ stuff, is that correct?

It would have been wild if there was some text in there that mentioned how the figure almost looked like your mom and made you feel an overwhelming guilt or something like that - to kinda tie it back to the "bad" ending you could get.

Works fine here, but when I try to drop it on the game, it just shows the raw HTML