Command & Conquer: Red Alert 3: Uprising is a standalone single-player expansion pack to Red Alert 3, released for Microsoft Windows exclusively via digital distribution on 12 March 2009. Uprising has four mini-campaigns (one for each side, plus a special mini-campaign which tells the origin story of Yuriko Omega) and the new Commander's Challenge mode with over 50 separate missions. The game also features approximately 30 new maps for traditional skirmish, with many of these taking place in new environments, while some have unique scripts. It does not contain any multiplayer elements.