This subject is related to the Combine era.
This subject is related to the Portal era.
This subject is related to the Portal 2 era.


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Signicon003a.png This article is under construction as it lacks elements required to provide basic coverage of its subject and/or has yet to be fully integrated into the Combine OverWiki.

When the article is brought to a verifiable and presentable state, it will be reviewed as part of the Cleanup Project. You are invited to assist in its construction with your own additions and improvements.


Gravity is the force acting between two objects of mass. The most common and representative gravity that occurs in the nature is the gravity of planets. This causes everything on Planet to fall to the center of them. Naturally, Earth also has gravity, and Moon and Xen have a weaker gravity than Earth.

Combine Advisor, Nihilanth and Alien Controllers can float without being affected by gravity.

Some technology can manipulate gravity for control objects. Zero Point Energy Field Manipulator and Gravity Gloves are representative.