The higher the score you earn in a mission, the more medals you'll receive. These tips will help you rack up those medals and prove your might:
Cause destruction! You earn bonus points and keep your combo rolling by blowing up street lights, generators or enemy fortifications. Try experimenting by shooting the environment!
Combos are the key to a high score. Watch the combo meter in the top-left, which builds up on killing enemies or destroying environmental objects. If you're not causing carnage, this will begin to decay, so stay on the offensive!
Certain actions give you more points. Destroying a troop carrier before they can deploy units will award a carnage bonus, for example.
Be fast, stay healthy. The quicker you finish a mission, and the more health you have, the higher your score will be at the end of the mission.