Dawn of the Tiberium Age (DTA) is a stand-alone mod that combines and enhances Tiberian Dawn and Red Alert using a heavily customized Tiberian Sun engine. Featuring all 4 factions (GDI, Nod, Allies and Soviets) with extremely polished gameplay, DTA allows you to mix and match the factions as you'd like in tons of new multiplayer maps and challenge yourself in dozens of original missions. Since this is a stand-alone mod, you don't require anything but the mod itself to be able to play: the original game is not required.
It is getting harder to create previews without spoiling too much of the story...
Anyway, know that the campaign is progressing.