Strogg

"The Strogg: soulless fusions of decaying flesh, bones and metal, twisted and ruined by centuries of war. They search the galaxy for the sole item their existence requires, harvesting, consuming and destroying everything in their path. And now, they have arrived… here!"
 * — Intro to Quake Wars

The Strogg are the primary antagonists of Quake 2 and Quake 4. They also appear as one of the playable factions in Enemy Territory: Quake Wars. They are a cybernetic race of unknown origin that reproduces by combining biological components from their foes with advanced technology.

Homeworld
The Strogg homeworld is named Stroggos. By the time of their appearance in the Quake series, the Strogg had stripped the planet of its resources, and it is now a desert wasteland, lacking much of the original ecosystem. It's capital city is based in Cerberon, which was built in a massive crater called Crater Majoris. Despite losing most of its resources, the planet is still home to a small amount of savage animal life. There are various military and industrial facilities covering its surface.

Culture
Strogg culture is almost entirely dominated by a fixation on warfare. Most of the buildings on Stroggos are armoured bunkers, weapon facilities, defences and massive fortifications. One exception is the Palace of Cerberon, which is a prestigious example of Strogg architecture. Due to the presence of nationalistic banners, it's possible that the Strogg once had a national identity or took pride in their culture. It's possible the Strogg still make and display these banners as a holdover from a past age when they were less enslaved by their technology, since otherwise the Strogg would see them as a waste of resources due to their lack of need for morale and military pride.

Social Structure
In Strogg society, the biggest and strongest individuals are automatically considered superior, and have higher authority. The most superior member of the Strogg race takes on the title of Makron, and has absolute authority over the Strogg civilisation. Larger, more powerful Strogg have little to no respect for their weaker brethren, and will kill or trample lesser Strogg footsoldiers if they get in the way.

Stroggification
Stroggification is a process the Strogg use to convert biological components into more Strogg. The Strogg collect corpses of their enemies and use them to create more soldiers. Irretrievable bodies are processed into stroyent. Stroggification is also practiced on live prisoners of war. Natural limbs are removed and replaced with advanced Strogg technology. Microscopic robots called nanites introduce them to the cybernetic augmentation process, and finally a neurocyte is implanted in the brain, it's purpose is to change their thought process from Human to Strogg.

Stroyent
Stroyent are liquified rations that refuel and feed their cybernateic bodies. It is a cannibal food that is made from any dead matter they can get their hands on.

Medical Research
Most humans who are captured alive are sent to stroggification, though there are those who are much more unlucky. Captives who are not stroggified are forced to undergo mortality tests. Because the Strogg want to study the pain of their victims and their bodies response, Strogg scientists begin removing organs without applying any anesthetic. They also want to ascertain how long the body can last without specific organs. The torture is long and horrific and inevitably leads to the captive's death. Strogg medical research lacks a concept of ethics, and as such they will do anything they think will help them advance the stroggification process, advance their own medical capabilities, or enhance their weapons to be better at killing.

Technology
Compared to Humans, Strogg technology is overwhelmingly advanced. Their most advanced technology allows them to travel great distances using wormholes, which was used to bridge their assault on the Earth. They also employ the use of teleporters that are specially made to only transport Strogg, and will kill any unstroggified Human that tries to use them. Whether or not that is a security feature or a part of Strogg physiology is unknown.