Zombie Strike Auto Farm

--[[
// Diificulties: 1: Easy, 2: Medium, 3: Hard, 4: Very Hard, 5: Extreme
// Gamemodes : "Mission" or "Arena" ONLY
Campaign in mission: 1: The Retro City, 2: The Factory, 3: The Firelands, 4: The Frostlands, 5: The Wild Wild West, 6: The Magic Tower
]]
_G.autoheal = true
_G.difficulty = 1
_G.gamemode = "Mission"
_G.hardcore = true
_G.campaign = 6