Headhunter

On Disc One, when you visit the Wolfpack Gas Station, enter the shop and go into the back room. In there you'll hear Richard Jacques' 'California Demon' playing on a radio. 'California Demon' is an original song by Jacques that first appeared in Bizzare Creations' 'Metropolis Street Racer'.

Beating the game, another option will appear. It's the Heahunter V2. The game has some changes and the difficult is harder.

Successfully complete the game.

Adam's attack are very powerful -- stay away from him. First, turn the gas pipes on by looking for a console that has a diagram of them. Look around the room to find a smaller A & B console. Look carefully and you will see the gas pipes. Shoot Adam five times rapidly and he will stop. Then, shoot the pipe. After you hit him, run as fast as possible because he will run after you very quickly. You will get damage no matter what, but you will have to repeat the whole thing again to kill him.

This battle is different than when Angela fought Adam. He will now stand in the center of the room and shoot lasers at you. The red ones are easy -- hide behind a wall. For the blue ones, you have to guess where it is going and get out of there.