Dear responsible of Lidraughts
I think it would be a good thing to give the opportunity to have all the games of a tournament.
Playok gives that opportunity in a .txt file and i use it a lot
It could be very useful for magazines, for analysis but not only. To create big evenments and to talk about them.
I think it would be an error to miss that.
Yours sincerely
Philippe Jeanneret
editor-in-chief "Le jeu de dames"

That is in fact possible, although it is a bit of a hidden option. There hasn't been much demand for it until now.

You can open lidraughts.org/api/tournament/{id}/games and replace {id} with a tournament id, to get all the games in a PDN file.

For example to get all the games of this hourly bullet:
lidraughts.org/tournament/L4F4P5R8
You can open lidraughts.org/api/tournament/L4F4P5R8/games in your browser

I did not succeed to download the games of the clock simultane of JohnTCover.
The link with the id does not work.
Is there another possibility to download all games?

The above explanation only works for tournaments. For simuls it is even easier, there is an 'Export simul games' button, on the top right in the simul lobby (this button is visible once a simul is finished): lidraughts.org/simul/0H2bFElQ

Thank you RoepStoep for explanations !