Challenges ruin this game. I could go flip a coin and have more fun, since I have just as much chance at influencing the outcome there as some of the challenges. Challenge 9 in particular.
Maybe an addition of a 'story' mode or some such where you are trying to hold out for a fixed amount of time for extraction. Would let people feel like their actually accomplishing something. Still a fun game though.
If borders are closed, travel banned, and the more expensive barricades on the roads... I really think a state that is 100% immune should stay clean. If it is 100% immune, how do I all of a sudden get 20 infected people from?
Adding a way to prioritize targets for your lasers and missiles would be very nice. Losing count of the missions on Hard and Crazy I lose because missiles and THELs fire on the mothership fighters rather than the motherships themselves.
Really need to cap the call times for artillery/air support. I can understand some delay, but I just had five (5) waves come trough while I waited for the artillery strike. Might have taken longer the the SS blitz sent their entire wave through without my being able to do anything.
Calling for Air Superiority needs to be faster. I call for it the moment I get notification of incoming enemy aircraft, and 75% of the time the enemy airstrike has already hit me before the call completes. Other than that, this is a very fun game!