the spartans: get the quacker gun -- update reload to '0'. get 3 laser towers and update their power only up to 24 each. it will shoot once and kill the spartan. update the wall almost to the max so it's 500 strength. with the remaining money buy repair men. you should have about 6. if u have money left over update your gun to have more power. THEN. when you are playing at once begin to send thunder with your gun. notice the guys that are falling backwards. as soon as they stand up and pick up the sword, send the thunder again to make them all fall. this is because they are the slowest to get up and if you shake the ground before they get up they will just keep walking. then when they get to the wall, just time your clicking. click to send thunder after they pick up the sword and about to attack the wall. That's all. the lasers will zap them and your thunder will slow them down. :D hope it helped!