Medal of honour : Allied Assault Expansion

Spearhead is the first expansion pack for Allied Assault. It was developed by EA Los Angeles. Spearhead re-enacts 3 major European Theater battles through the eyes of Sgt. Jack Barnes (who is voiced by Gary Oldman), a paratrooper of the 501st Parachute Infantry Regiment, 101st Airborne Division. As Barnes, players land behind the Atlantic Wall on D-Day in Normandy, hold the line near Bastogne in the Ardennes during the Battle of the Bulge, and infiltrate Berlin before the Red Army begins their attack. Spearhead adds Russian and British weapons to the player's arsenal as well as being available for multiplayer selection.

Breakthrough is the second expansion pack for Medal of Honor: Allied Assault this time developed by TKO Software where the player takes the role of Sgt. John Baker of the US 34th Infantry Division. This campaign covers the Battle of Kasserine Pass, the turning point of the North African campaign, the fall of Bizerte and the Allied invasion of Sicily in 1943, along with the epic race to Messina, Italy between George Patton's 7th U.S. Army and Bernard Law Montgomery's British 8th Army, the bloody Battle of Monte Cassino, followed by the amphibious landings and defense of the beachhead at Anzio, Italy in 1944. Breakthrough adds Italian weapons for single player and multiplayer as well as the British and Russian weapons from Spearhead.