Tiberium is green chrystal growing from the ground and collected for
resources in Command & Conquer and Tiberian Sun.
Tiberium is highly hazardous for DNA, as 15% of it is still unknown
substance. Tiberian Sun has also blue exploding Tiberium and Tiberium
wastes. If you've ever seen realtime strategy game, you understand
the main thing: it must be collected to build an army.