UPDATE 14/10/2014 5.35pm: It looks like The Walking Dead: Season One is also out today on PS4 - in North America anyway.
No word about it getting an early release in Europe on Sony's latest console, so it'll probably come out on its previously announced release date of 24th October.
ORIGINAL STORY 14/10/2014 1.52pm: The Walking Dead: The Complete First Season has launched for Xbox One - a week earlier than expected.
The 4.65GB download is available to buy from the Xbox Store for Ł19.99. Developer Telltale had announced a 24th October release date for PlayStation 4 and Xbox One. We can't see that it's out for PlayStation 4 yet.
Interestingly, the Xbox Store lists a 31st October 2014 release date, despite the game being available to buy now.
The Walking Dead: The Complete First Season contains the five-part episodic series plus bonus episode 400 Days. You play Lee Everett, a convicted criminal, who is given a second chance in a world packed with undead.