Over at Tokyo Game Show 2012, SEGA revealed 3 new trailers for Phantasy Star Online 2. Currently in its commercial stage in Japan for the PC system, the PS Vita version, coming 2013, will sync with it (players on PC and PS Vita share the same server). The PC English client will arrive in Spring 2013.
Update: A new video surfaced in the Japanese media, with a look at an attendee having a hands-on session for Phantasy Star Online 2 on the PS Vita. Looking really awesome at this stage.
