Ryan Wombold writes: Acquire is certainly no stranger to stealth action, having developed the seminal Tenchu series. Now, they’re back to ply their shadowy trade on the PlayStation Vita with Shinobido 2: Revenge of Zen. A sequel to a title that was not released stateside, Shinobido 2 follows the titular ninja Zen as he attempts to avenge the destruction of his clan (so it’s not just a clever title). That is essentially the extent of the story, which is just one of the many disappointments on display here. Despite some interesting extracurricular activities, Shinobido 2 fails to get off the ground with gameplay and mission design that is clearly stuck in the same generation as its forefather.