You can currently pick up Zero Time Dilemma on PC, PlayStation Vita, or Nintendo 3DS. You can also play the entire trilogy, including 999: Nine Hours, Nine Persons, Nine Doors and Virtue's Last Reward, on those platforms. There is an odd man out though. Currently, 999 and VLR are available on PlayStation 4, but Zero Time Dilemma is not.
It seems like that will be changing soon. It's not official yet, but there's an Amazon listing for Zero Time Dilemma on PlayStation 4. The listing has a placeholder release date of August 18, 2017. There's no price given, but it'll likely cost the same as the Steam release, which is $39.99. Like the other versions, Zero Time Dilemma on PS4 is listed as having English and Japanese voice acting.
This is the second game leak from Amazon this week, with the first being the reveal of Darksiders 3 for PC, PlayStation 4, and Xbox One.