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 appearance 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, which attached itself to a host. (EDA: Halflife)