THE STROGG
The Strogg attacked and devastated Earth before being driven offworld. Rather than leaving them alone, humankind elects to launch a retaliatory attack on the Strogg homeworld (Stroggos) in Quake II, with the aim of causing chaos in the Strogg society by eliminating the Makron, the foremost Strogg leader, and crippling important military facilities. The attack, in which Marines were dropped to the planet's surface in pods, was a disaster, as the Strogg utilised thereto unseen EMP defenses. A single marine, sent off-course by an accident, nevertheless managed to destroy various tactical structures and assassinate the Makron. In Quake 4, human forces began a renewed attack, on a far larger scale, with the assumption that Strogg forces would be in disarray following the death of their leader. However, it was realized during the events of Quake 4 that a new Makron was already in power.
The Strogg, being a warlike cybernetic race, are infamous for extensively replacing significant portions of their bodies with weaponry and mechanical prosthetics, so no two Strogg are ever truly the same. They maintain a massive global military-industrial complex, with mines, ore refineries, light production plants and heavy industrial manufacturing facilities all over Stroggos. This heavy reliance on industry however has managed to kill most of the plant and animal life on their planet. The living animals that remain have been subject to horrible mutation. One of the most notable features of the Strogg is their complete lack of sense for the macabre or cruel and their willingness to do anything to anyone so long as it serves a practical purpose and is in their best interests. They use warp-holes to invade other planets, for food and resources.
"The core of the Stroggos civilisation is the capital city of Cerberon." This city is built into the base of an enormous crater dubbed 'Crater Majoris'. A smaller crater - 'Crater Minor' - houses the defence base for Cerberon.
THE GUNNER
The Gunners have a free hand (left), a gas mask and mêlée attacks. Their implanted guns (right hand) consist of a nail gun and grenade launcher. The appearance of the organic part of its head hints at a relation with the Berserker. They and their relatives seem more likely to be humanoid aliens than modified humans.