Factorio Forums

I've have started a new game (see the screenshot). After a while I got "Mass production 1" achievement. Unfortunately I didn't have time to take a screenshot because I was surprised so that notification disappeared.

The only explanation I have is that for a short time I loaded an old game where I already had many factories before starting that new game. I tryed to repeat it (surely deleted achievement.dat and restarted the application) but there wasn't success.

I do not see anything wrong here, counter for this achievement is cumulative across saves so if you had 9999 of electronic circuit before and crafted Lab or Offshore pump, you would get it at that stage of the game.