In Resident Evil: Operation Raccoon City for the PS3 and Xbox 360, beating Nemesis can be a real pain in the ass. He’s a big bad ass with a mini-gun that calls in a lot of enemies to help him, so how do you beat him?
The primary things you want to do is keep your distance, and keep your ammo up. Stay on the rafters, because trying to get up close will only get you killed very quickly.
Empty your clips into his head, and only his head. Stick near an ammo box if possible, and clear out any extra enemies that come for you.
Try to flank him from the sides when he has your teammates targeted every chance you get.
He’ll send out more and more enemies as his health depletes. Keep up the head shots and he’ll eventually go down.