The game is set for release Jan. 26 on PlayStation 4 and Windows PC. Thekla previously announced an iOS version, which is scheduled to be available "some months after" the game debuts on PS4 and PC, according to its website. That page also says The Witness will come to "other platforms a bit later," although Thekla has not confirmed any specific platforms.
Reached for comment, Blow told Polygon that Thekla only mentioned an Xbox One version in its submission to the ESRB to avoid having to resubmit the game in the future — if the company does decide to bring The Witness to Xbox One, that is.
"We only put XB1 on there because it doesn't cost anything, and if we were to want to do an XB1 version later, we don't have to go through ratings again," said Blow. "But it is totally provisional, we have no plans for an XB1 version right now."
Blow announced in February 2013 that The Witness would be a timed console exclusive on PS4; at the time, he planned to release the game during the PS4's launch window. Blow originally announced The Witness in 2009. It is his next game after Braid, the celebrated puzzle-platformer that debuted in 2008. For more on The Witness, check out our interview with Blow from September.