how to get the hard badge : first buy the best wheels , transmission and engine after that buy fuel for 760 $ 2nd day : buy booster , upgrade your fuel to the max , upgrade booster for the money you have left 3dr day : buy gun, upgrade gun for all the money you have . Now use your booster wisely , try making high jumps and use it while the gun is in effect because later zombies will get in the way .... good luck
this game is buggy... i just poured the drowned elexir thing into the pond and after Derida came out i still dont identify him... and the "who is derrida" icon stays instead of getting completed