Find a Messerschmitt airplane
Military training succeeded
Find a Spitfire airplane
Apply an upgrade to a tank
Apply an upgrade to 3 different tanks
Improved all attributes of a tank
Apply an upgrade to 6 different tanks
Improved all attributes of 3 different tanks
Improved all attributes of 6 different tanks
Killed by airplane bombs
Fully upgrade a tank
Survive bomb attacks
Collect all medals
Win 15 different levels on Russian Winter campaign
Start a winter campaign level