Ubisoft is giving away their game Assassin's Creed Unity for PC in memorium of the fire that destroyed Notre Dame de Paris Cathedral. The church was recreated in extreme detail for the game so Ubisoft has decided to give away the game to anybody who wishes to see the cathedral as it once was and never will be again.
The accuracy of detail for the game could help in restoring it as closly as possible to the original.
You can download the game for PC until April 25th. Once you download it, it's yours forever.
You can also make a donation for the restoration on the download page if you'd like.