Whats with all of the top comments? ALL well designed games and developers who worked hard on them have a right to ask for money. I enjoyed playing the free content even if it was short. +1 for autofire
How I got the hard badge with two extra upgrade points and bet the last level in under 2 minutes: 1) Upgrade Post haste, resupply inbound, in good supply ASAP 2) Upgrade ballistics, take cover, the two tank upgrades and one mortor upgrade in whichever order works for you. 3) send infantry based on the path they are taking, if there are open barricades send .50 cals if there are enemies behind barricades send Assult teams. If there are no barricades I just sent Riflemen. I sent my tanks at the bottom or top so they can only take fire from 2 rows of enemies. Against tanks use Bazooka & riflemen combo. rifle men are good for drawing fire of more expensive infantry such as tanks, assault teams andd bazooka to take extra fire because they are cheap.