Zero Escape series director Kotaro Uchikoshi announced at this year’s Anime Expo that 999 will be ported to “other platforms”, accompanied with brand new voice acting.
Although he didn’t specify which platforms it will be ported to, it is safe to assume that these will include the PC and the PS Vita, as Uchikoshi has previously teased a PC and Vita port on his Twitter.
Alongside the announcement they showed off some footage of the port itself, which featured Santa’s voice actor. You can view the footage right here (via RPG Site).