Arrows/wasd to move. hold mouse to shoot. This boss is extremely hard, first person to beat it gets a follow.
Boss 10: The Experiment "You have defeated monsters as an act of revenge. Little did you know, you were merely doing my dirty work. I set up the path of monsters for you to destroy, so I could take their power from their bodies. This monster is an amalgamation of all of their powers. Your chance to win has gone. You, the last human on earth, Prepare to face your END." -The king of monsters