General Maxilla is a character and the main antagonist in Serious Sam: Double D.General Maxilla is one of Mental's generals. He appears to be involved in Mental's latest scheme, as he appears to be the reason why there are monsters and crystal beacons in three time periods. It seems that the volcano near Pompeii is a part of his ultimate goal, as he has built an underground base in it, most likely to harvest the energy in it for something evil.