Earn all medals and the highest rank in all missions (Act I and II).

Finish act I (single player).

Finish act II (single player).

Finish all missions on HARD difficulty level (Act I and II).

Shoot down 300 fighters in Campaign mode.

Shoot down all V-1 rockets headed for London (single player).

Fly under every bridge in London (single player).

Defend all battleships at Iwo Jima (single player).

Shoot down 6 planes in under a minute.

Drop a bomb on a plane during takeoff.

Shoot down an enemy fighter with a rocket.

Launch more than 100 rockets in a single mission.

Play a co-op mission.

(1) 

Finish a single mission in Simulation mode (other than Baptism of fire).

Finish the Russian campaign (single player).

Earn all medals and the highest rank in all missions (Eastern Winds).

Stop the train before it reaches the railway station (single player).

Win all duels with enemy ace (Eastern Winds).

Finish the African campaign (single player).

Earn all medals and the highest rank in all missions (The Sands of Africa).

Destroy 3 enemy ground vehicles with one bomb.

Sink 5 ships in under a minute.