The first step is to win the Heavy Bomber (Siberia) That will unlock
Terrorhurtz. Then go to "Training Ground" And select Terrorhurtz as your
robot and Chaos 2 as your opponent. Then in the battle, go behind or to
the side. Push him up against the arena sidewall and line your ax up
against edge of his flipper with enough tries and a lot of aggression
you will be able to knock his flipper and a lot of his armor off. Than
try to get at his battery. If successful, YOU'VE BEATEN CHAOS 2!