Haven't spent one penny. 13 Levels beat with 3 medals. 13 levels beat with 2 medals. 68 medals all together. So no you do not NEED to invest $$$ to beat the game. You will have to go back and win levels after your army is leveled up.
Good game. Needs reset on upgrade points and game reset.
Solid game, especially when I finally realized I can go back and play the older training levels. It would be nice to see exactly how many shooting, passing dribbling points I have earned and how exactly they effect the game in the gui. Thanks again, will play this for a while.