Command and Conquer 3: The Forgotten aims to bring back and tell the story of a fascinating faction. The Forgotten, featured in Tiberian Sun and Firestorm, are an ever-growing group of individuals afflicted with Tiberium-based illnesses. Detested, marginalized, and oppressed by the three superpowers, The Forgotten have begun to rally against GDI, Nod, and the Scrin. Since their story is not featured in C&C 3, the mod aims to tell it in a compelling fashion, through a deep singleplayer campaign, unique faction composition, and engaging gameplay. The Forgotten is also the only mod to feature high-definition Full Motion Videos, just like real C&C games, that advance the story.
The Forgotten is an interesting side with many cool units and ideas, but some of them don't really fit in my opinion, melee units for example.
The campaign and the cutscenes are good. Not great, but good. The campaign missions are quite repetitive (all missions are of the style "build a base and crush your enemies") and there are some things breaking the immersion, such as in some missions the Nod, GDI and Scrin seem to be allied with eachother (they target the player all the time, even if their units would be next to eachother). The missions give a nice challenge though.
GDI, Nod and Scrin haven't changed much so the multiplayer is pretty much like basic C&C3 with one new side. Nothing special.