Let the landings begin! D-Day drops players into the role of World War II Allied forces in the final drive to liberate Europe. Throughout three campaigns and 12 missions in single player mode, D-Day challenge players to prepare troops for battle, create combat strategies, and execute one of the largest military invasions in wartime history.

Players must successfully plan and execute the turning points in the liberation of Europe: the first hours of the beach landing at Omaha Beach, the paratrooper attack on Sainte Mère Eglise, the taking of the Cherbourg harbor, operation Cobra, the battle of the Falaise pocket, and the liberation of Normandy in August 1944. During the campaigns, players can call in the help of resistant forces to recon the landing areas, take advantage of the Allies' air power (bomber, glider, paratroopers), and stop the German forces' counter attacks. D-Day features over 60 historically accurate units, including rifleman, paratroopers, artillery, tanks, transports, and air support.

The multiplayer mode uses GameSpy's online Matchmaking network, allowing up to 8 players to play simultaneously on 12 different maps using 3 different modes. An editor allows players to create their own multiplayer maps.

D-Day uses cutting edge 3D technology providing the game with advanced damage and destruction models, a realistic physics animation system, real-time shadows, stunning realistic landscapes and much more. Like its predecessor, Desert Rats vs Afrika Korp, D-Day combines real-time strategy and turn-based gameplay elements. For instance, to best establish your strategy, you can pause the game at any time and plan your operations, give out your orders, un-pause the game and see your orders carried out!