ommand & Conquer: Red Alert takes place in a parallel universe. At the Trinity Site in New Mexico in 1946, Albert Einstein prepares to travel backward in spacetime. He activates his experimental time machine to find himself in Landsberg, Germany, on December 20, 1924, where he meets a young Adolf Hitler just after the latter's release from Landsberg Prison. Following a brief conversation between the two, Einstein shakes Hitler's hand, which erases him from the timeline.
Hitler's death prevents him from rising to power as leader of Nazi Germany, which creates a new timeline. Without Nazi Germany, the Soviet Union grows powerful under the rule of Joseph Stalin. The USSR seizes land from China and then invades Eastern Europe, to achieve Joseph Stalin's vision of a Soviet Union stretching across the entire Eurasian landmass. In response, the U.S. and the countries of Europe form the Allied Nations start a guerrilla war against the invading Soviet Army. Over the course of the game's story, the Allies and Soviets fight for control over the European mainland in an alternate World War II.
- Allied ending: Following the siege of Moscow, an Allied platoon discovers Stalin buried alive in the rubble of the Kremlin. Before they begin to remove the debris from the fallen leader, General Stavros stops them. He convinces them that they saw nothing and orders them to leave the premises. Stavros then stuffs a handkerchief down Stalin's mouth before covering his head with a large stone and walking away.
- Soviet ending: As the Soviets celebrate their victory in the newly captured Buckingham Palace, Stalin commends the Commander (the player), but is poisoned by Nadia, who guns him down as the poison overcomes his body. Following Stalin's death, Nadia tells the Commander that the Soviet Union is now under the rule of the Brotherhood of Nod, who plan to return to the shadows again and reemerge in the 1990s, leaving the player as the puppet ruler of the USSR, ready to do the Brotherhood's bidding for "the foreseeable future." She is betrayed and shot in the back by Kane, who reveals himself to be the true mastermind.