Maker (Halflife)

The Makers were parasites who were at war with the Oon.

Biology
The Makers possessed people and restructured their bodies to make them more efficient. They could change the appearances of their hosts at will by redistributing mass and rearranging chromatophores in their skin. Whilst converting a host's body, the Makers could make the host forget about the presence of the Maker. After conversion, the Maker destroyed the personality of its host body. The true form of a Maker was Y-shaped until it attached itself to a host. (EDA: Halflife)

History
In the 61st century, a Maker called Reo attempted to capture a rogue Maker bioship to help in the Maker's war with the Oon. (EDA: Halflife)