紅色警戒
"", released on November 22, 1996, is set in an alternate universe 1950s and was originally made to be the prequel to "Command &amp; Conquer" establishing "Red Alert" as the prologue of the entire "Tiberium" series of games.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 &amp; 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 &amp; Conquer: Red Alert" had sold over three million copies.