Game Designers' Workshop produced many series of game, each related to the other in terms of subject and play methodology. Unentschieden, a game from the firm's Europa series, dealt with the latter part of the German invasion of Russia during the end of World War II. It followed a game called Drang Nach Osten! which covered the first part of this invasion, beginning in 1941. Unentschieden was later published under the name Scorched Earth.