Destroy 500 tanks

Destroy 200 aircrafts

Destroy 200 buildings

Destroy 200 cannons

Complete the first mission

Complete the fourth mission

Start the level anew 5 times

Halfway through the game

Upgrade the aircraft to maximum

Complete the whole game

Buy a new aircraft

Blow up the building

Buy the best aircraft

Pass the first era

Pass the second era

Go through the third era

Go through the fourth era

Accumulate 5000 finances

Drop the superheavy bomb