D-DAY was completely revised in 1977 to incorporate the latest simulation design innovations including Strategic Movement, Air Interdiction, and Tactical Airpower. It is an Intermediate 1 level game on the Avalon Hill Complexity Scale for 2 players aged 12 & up with a varying playing time of 1-4 hours. D-DAY belongs to the Avalon Hill family of classic games suitable for play-by-mail in much the same fashion as chess.Magazine References:The GENERAL Index Article List: The GENERAL Vol.14,No.6 D-Day - 'D-Day: The Evolution of a Game' (Design Discussion/Variant) Joel S. Davis The GENERAL Vol.15,No.2 Design Analysis - 'The Redesign of D-Day' (Design Commentary) James Stahler The GENERAL Vol.15,No.5 D-Day - 'FORTRESS EUROPE REVISITED: New Tactics for a Not-So-Old-Game' (Tactics) by Rob Beyma The GENERAL Vol.16,No.3 The Question Box - D-Day The GENERAL Vol.18,No.2 D-Day - 'Hit the Beach! - But What Happens When the Beach Hits Back?' (Insert) James Stahler The GENERAL Vol.18,No.3 The Question Box - D-Day The GENERAL Vol.18,No.4 The Question Box - Circus Maximus, Gladiator, D-Day The GENERAL Vol.21,No.1 D-Day - 'Blood on the Beaches - D-Day, The Allied Invasion' by James M. Lutz - BoardGameGeek