This is an advice to anyone who is trying to get the impossible achievement.DO NOT use the biological class it is impossible! biologicals need training to make it to the hole game even on easy they still need training. the best class would be phsycological they dont need as much training as the biological do. you may have to experament a little to beat some hard parts but you will make it to the mayor. im already there and you dont need the girl in youre team since you already controll dark powers and after you unlock zone 7 you can train as much as you want.oh and screw armor games for not letting u use the hydraulic that would have been the easiest class to get the damn achievement!
 "Warlords: Heroes"){kind=icon}
 "Sonny 2"){kind=icon}
 "You Have To Burn The Rope"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}
 "Master of Fortresses"){kind=icon}
 "Necronator"){kind=icon}