Is there a way to copy my save file?

[Gwydion]

I'm near a few endings and I want to be able to play each of them out without having to replay the whole game. Is that possible?

[kia256]

You can backup your save and then replace the new one with the backup.
It should be in C:\Users\*your user name*\AppData\LocalLow\Jump Over the Age\Citizen Sleeper

[Redglyph]

Maybe Steam Cloud will directly replace the file with the last one it saved, though.

I think that one way to get around that is to replace the save file while the game is running. Or to disable Steam Cloud for this game, of course.