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The 3rd and final boss of Bionic Commando on the hardest difficulty.
I found both previous bosses harder than this one but the problem with Groeder is his fast instant kill attacks, you may find it hard to distinguish between them and i know some people do, both his attacks require good timing to avoid and doing the wrong thing will kill you.
Apparently you can roll then jump which avoids both attacks since if you roll you avoid the charge and if he doesn't charge then you have time to jump out of the way of his jump attack, this may only hold true for lower difficulties because if i jumped early i would die and rolling is slower than walking so the shockwave could still catch you, it's worth a try though.