You can buy it
well, u defeat different bosses, for ex. i always get MY mithrils from the last boss.
kill aliens
Yes
i don't think you can
get 5 kills with 1 airstrike
Do the challenge "Ultimate Sacrifice" which you unlock be nuking the enemy while you are losing
they are prolly updating the game
you have to beat each level on a higher level like a three star and not just a one star mode.
It won't work for me either
The server maybe down for maintaince.
You obtain the achievement named ''Star 69'' worth 90 points.
There's no limit; you can create as many as you want: Neighborhood warfare, forest warfare, lake warfare, football warfare, etc. However, generally, when studying history, the traditional ones are: Aerial warfare, naval warfare, guerrilla warfare, conventional and unconventional warfare, urban warfare, jungle warfare, desert warfare, mountain warfare, etc.