Atlus USA has Shin Megami Tensei: Devil Survivor Overclocked slated for release on August 23. Japan won’t get the Nintendo 3DS version until September 1, according to Famitsu.
Typically, Shin Megami Tensei titles, even spinoffs like Devil Survivor, are released in Japan first and in North America a few months later. Shin Megami Tensei: Devil Survivor Overclocked will break the trend by a couple of days.
The enhanced version of Devil Survivor has new character portraits, voice acting for cutscenes, and perhaps most interesting to fans "the 8th day." This scenario picks up from whatever ending you earn in the main game.