Locations in the Half-Life universe

This is a list of the locations featured in the Half-Life and Portal universe, listed by game, and in chronological order.

Half-Life
Main Locations: Black Mesa Research Facility, Xen

Half-Life: Opposing Force
Main Locations: Santego Military Base, Black Mesa Research Facility, Xen

Half-Life 2
Main Location: City 17

Half-Life 2: Lost Coast

 * St. Olga

Half-Life 2: Episode One
Main Location: City 17

Half-Life 2: Episode Two
Main Location: The Outlands

Portal

 * Aperture Laboratories

Portal 2

 * Aperture Laboratories