Riftworm

Riftworm is a alien species of massive creatures that create burrows by tunneling its way beneath the surface. It is described as semi intelligent and considered as a "god" to the locusts themselves. They normally devour everything in their path and its waste can produce life within the hollow and also have living parasitic organisms inside of them called Nemacytes.

Appearances

 * Gears of War 2 (2008)