White Forest is a secluded rebel compound in the outskirts of City 17. It is one of the new locations in Half-Life 2: Episode Two.
The base is a decommissioned Cold War-era Soviet missile silo that was acquired by Black Mesa late in its history, though no signs of this appear to be present. By the time of the game, it has become an important rebel headquarters. Most of the base lies underground; it features many crucial facilities such as communication rooms, pump stations, a garage, a helicopter hangar, and a launch control center. Also included are two missile silos: the primary silo is in use for building the rocket instrumental in closing off the Citadel superportal, and the secondary silo is abandoned. An enormous double antenna stands above the primary silo, serving as a notable landmark for the base as a whole. In the compound itself, most passages are separated by blast doors. While players will often find themselves in narrow corridors, navigation is fairly straightforward.
The base is built in an uneven forested area, making it more difficult to access. On its southern side there is a deep valley with a shallow river which leads to one of the entry points to the base. To the north lies an expansive valley with smaller buildings, such as a sawmill, and other landmarks including a watertower, a single-track railway supposedly leading into the base, and two logging cranes. Many of these only appear to be there for decorative or referential reasons. Additionally, both entry points are connected through the garage within the base.
Inside, true to its military purpose, White Forest consists of mostly utilitarian spaces commonly filled with computer equipment for rocket launch and surveillance monitoring. Pipes and wiring are ubiquitous throughout the environment. While not visited in the game, certain concrete buildings seen on the surface can be presumed to contain the personnel quarters. The lighting utilizes primarily warm colors, with pale white and hazard red lights seen in the more technical areas. Some of the compound's Soviet legacy is still present, most notably in the form of Russian signage for the various sectors and facilities, as well as the red star symbol on some of the walls.
The base is the current residence of Dr. Kleiner, Eli Vance and a new character, Dr. Magnusson. Judith Mossman also stayed here at some point before her disappearance. The base is subject to multiple attacks. First, Combine Soldiers and Hunters attempt to sabotage the rocket launch by invading the base through the secondary silo, and later Striders accompanied by Hunters try to destroy the rocket silo from the outside. The player must fend off the Strider attack using a new weapon introduced in Episode Two, called the Magnusson Device.