we see on the site telecharger.com

http://www.01net.com/telecharger/windows/Jeux/jeux_aventure/fiches/117831.html

create a free account to get fallout in free games, how to get this game?

Sorry, that offer ended yesterdayish.

The offer has finished, you can't get it for free anymore.
Edit: Damn Ninjas.

From what i understand a few places said the wrong timescale. The offer ended at about 18.00 utc. But some places said a different time.

If you had done a very quick search of the forum you would have seen the official thread on the offer.

See you created an account to get the game, but missed it.

Sometimes, all you have to do to get a game is post in a thread here, but since you are new and don't know this, check your PM.

To be fair, that page is a bit misleading, as it gives you the impression that the game is indefinitely available for free. All it says is to register an account to download it.