Grievers

Tribes Extreme introduced a new tribe, the Grievers, who are a collection of Tribesmen who have left the other major tribes. Unlike the Greater Tribes, the Grievers fight by their own rules and it is not uncommon for them to dishonorable things. As such, they are viewed by the Greater Tribes as something akin to scavengers and pirates.

The Tribes Extreme campaign opened with the "Bone Ripper" tribe of Grievers having completely wiped out the player's holdfast (a military/civilian homestead where tribesmembers live), killing almost everyone. In the Greater Tribes, this is completely taboo - battle is highly structured, even ceremonial - you never attack civilians. The player must first rid his holdfast and surrounding area of remaining Bone Rippers then seek revenge.

With the cancellation of Tribes Extreme, this tribe never officially enters the Tribes universe and its timeline.