Yep, just finish some specific mission, like meeting the bigdaddy and searching for the origin of the robot. Then the robot just gone and game ends in a bad end. 

The whole route is just like the main story of this game and it ends in a bad way, worries me in the next version will the developer countinue on this route to finish the whole game. Or this badend is just one of those funny gameover, like sack explode or be arrested , that could be avoided.