If a run takes too much time I'm allowed to take short breaks, but what do you mean by that?

I can leave for today and continue tomorrow, or that's too long of a break? And what about the recording? Can I show you the full recording in one video? Or submit the 3 to 4 recordings with diferent links or something? I would think I can just add all recordings in one singular video with a simple editor so it can be reviewed properly.

And do I have to make a new account so the acivements can be shown? Or do I only need to play the game, do the specific things you expect for the achivement?

Short break means up to a couple minutes. There are ways to clear your steam achievements. All achievements pop ups must be visible in All Achievements run.

Wow, so if the run takes many hours, I cannot cut the recording! That's gonna be difficult! And I guess if I am in Xbox or Playstation I can just make a new account to make the run since I have the game in physical. But the achivements need to pop up