Killer Mario – These are our online games related to mario killer, such as camera killer, paper Mario world game, and many more that you can play free. Mario and Sonic will have to fight the zombie army with every weapon that they have. Help them to defense their base against the zombie attack. Mario has bunkered himself down on a hill above where the masses attack. Pick off the zombies one by one with your guns. After each wave, you will be given a chance to upgrade your weapons at the store.