Tiberium

Tiberium is a mysterious crystalline substance that arrived on Earth in 1995 near the Tiber river. It is the foundation of its namesake universe in the Command & Conquer series.

Tiberium is the main resource in Renegade X and is harvested by both GDI and Nod. The crystals come in many different varieties, with the green Riparius strain being the most abundant.