Eurogamer writes: There's no PS Vita version of Platinum Games hack and slash Metal Gear Rising: Revengeance because Sony's handheld can't cope with one of its key mechanics.
The spin-off, which stars cyborg ninja Raiden, has a free cutting system that lets players slice and dice enemies any way they see fit - and it's this mechanic Vita can't cope with.
"As of now we aren't considering a Vita version," Kojima Productions creative producer Yuji Korekado told Eurogamer at Gamescom. "The reason is one of the main appeals of Metal Gear Rising is this option of the free cut. That requires a lot of hardware power, which is only possible with the power of a PlayStation 3 or Xbox 360.