From Red Alert to Tiberian Dawn, to Red Alert 2, Generals, and Tiberian Sun, Command and Conquer, the iconic strategy game series by EA and Westwood, has seen a lot of new additions over the years.
Adjustable singleplayer speed isn't the community's most requested feature, however. That, apparently, is larger-scale multiplayer matches. Currently, Tempest Rising supports 1v1 and 2v2 scenarios.