The lost test subject, the "Creep Gonarch"

The "Story":
Black Mesa sometimes hired death row inmates from nearby prisons to send to Xen on suicide missions. When they hired one particular individual who was sentenced to death for multiple offenses we shall not even name, they expected him to just die, but still provide useful data.
Little did they know, this particular individual, depraved enough to try, managed to "intermingle" with certain organisms on Xen and was altered... into something so horrible that Black Mesa wiped all records of this particular test case and subject from all of their records, and nobody is allowed to speak of it.

From the author(s):
This idea came as we were discussing an internet lolcow with a friend, and somehow the Gonarch also came up, and we got the stupid idea to merge the two. What you see before you is the unholy Sin against God that came as a result. Enjoy the horror as you get to fight this abomination. I am sorry.

Model and mesh by Overfloater, modified by BrussTrigger.
Animations by Valve, modified by Overfloater.
Textures by BrussTrigger.