Bandai Namco Entertainment revealed the game's first promotional video earlier this month.
The setting of the game will be
Mikado City, centering on the headquarters of Border. Players can form teams with friends and choose between "countless" strategies based on the team composition and usable triggers for "unlimited" possibilities. Attackers, Shooters, Gunners, and Snipers are available for teams. Up to eight players can team up via the PS Vita's ad-hoc mode to play the game cooperatively, or to fight each other in teams.
Source : animenewsnetwork