Extra Men Every: 25000 Men For 1 Credit Game: 5 Difficulty Of Play: 5 Special Rules: The above are the default internal settings for this title and need not be changed. This is a Single Player Only Variation! You must start on Level 1 "Serf" Level. No Continues Are Allowed! No more than TEN  pteradactyls can be killed in a single wave or the score will be disqualified on grounds of point-scabbing.