They announced it last year, it just didn't have a release date due to the episodes not heading for Vita individually, so nobody reported on it.Game of Thrones was the only one that Telltale never announced for the Vita up until now.
http://www.videogamesblogger.com/2014/05/14/game-of-thrones-a-telltale-games-series-release-date.htm
Tuesday, December 2 PC/Mac worldwide, PlayStation 3 & 4 in North America. (PS3 versions may get delayed until December 9)
Wednesday, December 3 Xbox 360 & Xbox One worldwide, PlayStation 3 & 4 in Europe.
Thursday, December 4 Apple iOS devices worldwide.
Near-Future PS Vita & other Mobile versions will be confirmed later.
Based on the critically-acclaimed and Emmy Award-winning epic drama Game of Thrones; The multi-year, multi-title partnership between Telltale and HBO Global Licensing is targeted to premiere digitally in 2014 with an episodic game series for home consoles, PC/Mac, and mobile devices. Specific platform details are yet to be announced, but the console launch will at the very least include: Xbox 360, PlayStation 3 & PlayStation Vita, much like Telltales other current episodic series. (But hopefully Xbox One, PlayStation 4 & Wii U as well.)
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