Due the current Tokyo Game Show 2016 in Tokyo did DMM GAMES announced: that the franchise a RPG adaptation get will, what even already in the next winter 2017 for the PC released will.
I can imagine a full 3D animation: where you from several perspectives see can, how Ikoma or Mumei on or around the train jumping and the zombies mercilessly pierce or shooting (Well, probably in Devil May Cry manner)...xD
But really, this was to expecting, that from KnK sooner or later a game adaptation getting will^_^!