As the player successfully completes missions, he gains experience points that allow him to access subsequent chapters of the campaign.
It’s precise historical setting is the Battle of Stalingrad, in this case the air battle that took place between November 1942 and February 1943.
Strict and accurate to it’s tradition, IL-2 Sturmovik: Battle of Stalingrad is a pure simulator, dedicated to one of the most successful and famous Russian aircraft of the time.