In 2007 I posted a comment saying I would get all the badges for this... Well today... Four years later... I have gotten that final badge :)
Congratulations! You just won the Pizza Psychopath Badge and 30 points!
Pizza Psychopath (completed)
Badge earned
36 gold customers – Why do you do this to yourself? No one forces you to earn these badges. (ENDURANCE BADGE)
 "Viricide")
 "Depict1")
 "Hello Worlds!")
 "Papa's Burgeria")
 "Arkandian Crusade")
 "Papa's Pizzeria"){kind=icon}
 "Rebuild")
 "Dungeon Developer")
 "Level Up!")
 "Echoes: Operation Stranglehold")
 "Deadly Neighbours")
 "Bug War")
 "Chibi Knight"){kind=icon}
 "Mastermind: World Conquerer")
 "Creeper World Training Sim")
 "Heir")
 "Civilizations Wars")
 "The Enchanted Cave")
 "Zombies!"){kind=icon}