Worldwide Front 3

The story begins in Makin Island at night on August 17, 1942. Marine Private C. Miller watches the torture and execution of Private K. Pyle, a fellow Marine, by the Japanese. But before they could kill him, Miller is rescued by a squad of Marines, led by Corporal Roebuck and Sergeant Tom Sullivan just as they assault the island. The following mission then starts two years later at the beginning of the Battle of Peleliu. After breaking through the Japanese lines on the Peleliu beach, Miller destroys two Type 97 Chi-Ha tanks with rocket strikes, allowing their tanks to advance. At the end of the mission, Sergeant Sullivan is killed by a Japanese soldier with a bayonet. Roebuck, now promoted to Sergeant, and his squad make their way through the Peleliu swamps to launch an assault on a Japanese-held airfield to disable anti-aircraft guns. During the assault, Miller acquires a flamethrower and a bazooka.

The story then jumps to the Eastern Front on September 17, 1942 during the Battle of Stalingrad. Private Dimitri Petrenko regains consciousness in a fountain, just as German troops kill his injured comrades. When they leave, Dimitri meets Sergeant Viktor Reznov, another survivor, who tells him of his intention to kill a German general named Amsel who is responsible for the massacre. After killing some German soldiers in their way, Dimitri follows Reznov through buildings and streets and they meet up with the remainder of Dimitri's unit, who are about to assault the General's communication post. Dimitri is handed a sniper rifle. Reznov then picks up a submachine gun and sets off to assassinate the German general. During the assault, Dimitri manages to kill Amsel. Dimitri and Reznov escape and jump into the Volga River. The following mission starts three years later, during the Battle of the Seelow Heights, near Berlin. Dimitri has been captured by German soldiers in an abandoned house. He is saved when the Red Army attack the house and Reznov and his right-hand-man Chernov come in and save him. The Soviet troops advance through German lines and Dimitri aids them with a Panzerschreck until they reach a German camp.

The story then returns to the Pacific Theater. On Peleliu, the Americans are pushing further inland. Miller and his unit take out enemy mortar crews, so their tanks can go inland. They then proceed through the Japanese underground tunnels to attack the Point, one of the major Japanese strongholds, allowing American ships to advance, and the island of Peleliu falls into American hands.

The following mission campaign returns to Eastern Europe, where Dimitri and Reznov pilot T-34 tanks, pushing through German lines. The Soviet troops then board a train to Berlin. Upon arrival, they engage German soldiers on the outskirts of Berlin, commencing the Battle of Berlin. They then advance through the streets, killing any soldiers who stand in their way, taking no prisoners and eventually, the Soviet soldiers reach the entrance to the Berlin U-Bahn, where three German soldiers are attempting to capitulate. Reznov is unwilling to deny his men their revenge and gives Dimitri the choice of determining their method of death -- he and Chernov can shoot them, or the soldiers can burn them alive with Molotov cocktails. They head into the U-Bahn and start fighting German soldiers around the platforms, until a surge of water fills the tunnel and Dimitri, unable to avoid the oncoming tidal wave, almost drowns.

The story then shifts back to the Pacific during the Battle of Okinawa, where Miller takes control of a PBY Catalina flying boat, which takes part in a raid on three merchant ships. On their way back to base, the US fleet is assaulted. Miller's PBY, which is the only PBY near enough to come to immediate aid, arrives. They are able to rescue American sailors in the sea, while Miller shoots at Japanese PT boats and kamikaze planes. With the PBY almost completely destroyed, more US aircraft arrive. In the following mission, Miller's squad makes a ground assault on Okinawa. They clear out the Japanese from machine gun bunkers, allowing American tanks to progress. With the battle almost won, the Americans storm Shuri Castle. Having cleared the entrance, they reach the center of the castle. Once there, they encounter Japanese soldiers surrendering. However, when Roebuck and Polonsky go to search them, they reveal concealed grenades under their clothes, at which point the player is presented with a choice of saving either Roebuck or Polonsky. The remaining American troops arrive to assist the squad and engage the remaining Japanese soldiers in a battle in the castle center, after Miller calls in air strikes on two buildings, the Americans take Shuri Castle.

The final mission starts as Reznov drags Dimitri out of the U-Bahn to regroup with Soviet infantry. The Red Army then advances towards the Reichstag. Dimitri destroys four 88mm guns to allow Soviet tanks to advance and take out the remaining German infantry defending the entrance to the Reichstag. During the assault at the Reichstag's entrance, Chernov is badly burned by a German flamethrower and unable to continue fighting. Reznov, Dimitri, and the remaining Soviet soldiers then clear the Reichstag of its defenders, and reach the rooftop. Before he can replace the Nazi flag, Dimitri is shot by a dying German soldier, whom Reznov kills with a machete shortly after. Although wounded, Dimitri manages to plant the Soviet flag, signalling Soviet victory.
In the Background Dimitri can hear the Soviet Tune and a Parade.