additional question:
how to develop your economy to make more money? if you build more base which will spend more maintenance fee.if you don't build new bases ,the allien will quickly occupy other continents,and you will receive less money in a next month. I tried to shoot down every frame of an alien aircraft,and airstrike a base to obtain money,This is only pocket money, too little..in x-com game ,you just need to Launch satellites in every country ,and you will make big money to support you.but in XENO ,it does'nt make sense