Tiberium is the parasitical alien resource that the entire Command & Conquer Tiberium universe is based on. In Tiberium Alliances, it can be harvested by harvesters and is used as a resource to pay for structures and their upgrades. Tiberium can also be found in large amounts in crates in Forgotten camps and outposts and looted from raiding enemy bases. Tiberium is used for building and upgrading buildings within the base and on the defensive field. It is also used to repair damaged buildings and structural defenses after an attack.