The game has 5000 achievements and in order to unlock them you need only a moment.

You can obtain all of the achievements by opening the game just for a moment. The achievements will be unlocked and you can close the game so you won't have to wait for all of them to pop as notifications.

Info 1: as with similar games with a big amount of achievements like in this series or others, once you unlock many or all of them, the game might freeze or steam might lag after you try to close the game because the platform tries to update the achievements list. In that case i found that you can fix this issue by just restarting the computer.

Info 2: after you have unlocked many or all the achievements, despite the game being still installed or not on the computer ( and even if you have restarted the computer after you gathered them ), it might still cause steam to lag. To avoid this, just add the game to a collection and keep that said collection closed { so the collection doesn't show the game(s) it contains }.

Info 3: there is a chance the game will show all achievements unlocked even if you haven't played the game ever before, that's a bug - you have to open the game to obtain them.

The game runs alright on the Steam Deck and you can unlock the achievements just by running the game for a moment.

Info: like it does for the same reason and in the same way with the computer, the same issues might appear with the Steam Deck in which case a restart of the device will fix the issue.