Tanker, Michael Jackson, Santa Claus, Col. Sander, Ronald McDonald and Venom were turned zombie and they are secret weapon of this game to infect the whole world with their own hands.
I already playing this game one year ago and the siege weapon named void which means the castle will destroy if one turn, It is also release a black hole for 15 seconds. so If you negate my comment, this will void you.
That badge of the Day must be hard because slug must fail to kill final human and leave it alone. If the final human dies in the end you must replay the scene
Shoot creatures and drive over their corpses thus you will gather liquid which you could sell in repair stations. When you sell liquid you get money for upgrades.
 "Infectonator : World Dominator"){kind=icon}
 "Robin Hood - A Twisted Fairytale"){kind=icon}
 "Fixation"){kind=icon}
 "A Small Favor"){kind=icon}
 "Super Villainy"){kind=icon}
 "Warlords: Heroes"){kind=icon}
 "Crush The Castle 2"){kind=icon}
 "Tourist Paradise"){kind=icon}
 "TDP4 Team Battle"){kind=icon}
 "The Visitor"){kind=icon}
 "Labyrinth iXi"){kind=icon}
 "i saw her standing there"){kind=icon}
 "Super Stacker"){kind=icon}
 "Stealth Hunter 2"){kind=icon}
 "Fancy Pants Adventure: World 3"){kind=icon}
 "Learn to Fly"){kind=icon}
 "Axon"){kind=icon}
 "Batheo"){kind=icon}
 "Dawn of the Dragons"){kind=icon}
 "Burrito Bison Revenge"){kind=icon}
Shoot creatures and drive over their corpses thus you will gather liquid which you could sell in repair stations. When you sell liquid you get money for upgrades.