After filling Schabbs with hot lead, you'd think the weirdo would stay down, but no. Dr. Schabbs lives! After you kicked his ass and conquered Wolfenstein, he picked himself up and checked out the damage. After you killed Hitler, Schabbs removed mein Führer's head and placed it into his own chaingun toting robot of death. Hitler has returned and plans to capture the world! Your mission is to infiltrate the base and stop Hitler again before he can finish his plan!