Backrooms Stories now has Steam achievements.
There are 14 to find: one for the scariest twelve endings across the five stories, one for reaching your first ending, and one for collecting them all.
If you finished some of the stories before this update, you don't have to replay anything. The game checks your existing play history on launch and unlocks whatever you already earned.
The game is also 30% off during the Steam Summer Sale, so it's a good time to grab it if you've been waiting.
That's the whole update. Save files are untouched. If an achievement doesn't unlock when it should, let us know in the discussions and we'll take a look.
Thanks for playing.