The information was made public on the CDR database
The Binding of Isaac, a game which challenged the preconceptions about indie games and which showed that just two developers can really make a mark, will be arriving on Linux.The Binding of Isaac is a game developed by Edmund McMillen and Florian Himsl and features randomly generated dungeons, random items, enemies and bosses. You will not play the same game twice, but be warned, the difficulty of this title goes through the roof.
The other part of this information is taken from the CDR database and by no means is it completely certain. The CDR Database is a record of data that describes every Steam game and subscription provided by Valve for the Steam service.
Usually, the new entries in the Steam database are first visible in the CDR Database before their official launch.
If you are interested in this game, you should check out the official Steam website.