Command & Conquer: Red Alert, released on November 22, 1996, is set in an alternate universe 1950s and was originally made to be the prequel to Command & Conquer establishing Red Alert as the prologue of the entire Tiberium series of games. Louis Castle has said that connecting Red Alert with the Tiberium series was a "failed experiment". Red Alert introduces the Allies and the Soviets as rival factions roughly analogous to NATO and the Warsaw Pact of the Cold War. The game was received well by critics and has the highest average score of any Command & Conquer game with an average of over 90% from GameRankings and Metacritic, unlike the title's two expansion packs, Red Alert: Counterstrike and Red Alert: The Aftermath of which both received below average reviews for the series with 63% and 70% average scores respectively. Both expansions gave the game more missions and more units. For PlayStation only, there was also a separate release to the original called Red Alert: Retaliation which included all the maps, missions and units of Red Alert: Counterstrike and Red Alert: The Aftermath as well as some newly filmed cut-scenes only available with Red Alert: Retaliation. Before being re-released as freeware on 31 August 2008 by Electronic Arts Command & Conquer: Red Alert had sold over three million copies.
