It seems like the Steam version of Metal Gear Solid V: Ground Zeroes has a release date. Russian gaming websites are reporting the game will come to the platform on December 18th. The Steam version was announced at Gamescom in August, and today during Russian gaming event Igromir the release date was confirmed.
Update: Keep in mind that at this point the release date has now yet been confirmed by Konami.
Update 2: Konami has confirmed the release date, and announced the game will support 4K resolution. It will also feature ‘an increase in the number of simultaneous light sources, the number of models that can be displayed on-screen, and increased shadow resolution’.
On a side note, December 15th a patch for the console versions will be released fixing Russian translations, among other things.
Update: Konami has also provided some more details on the patch. The translations will be improved, and Kojima Productions has ‘worked with local agencies to re-translate and fine-tune Russian subtitles and menu elements for use in the game’.
Source: Gamemag.ru, Shazoo.ru, Konami Blog