File:HalfLife OF HECU.jpg

Summary
A Hazardous Environment Combat Unit team in Half-Life: Opposing Force. Depicted (left to right) are two standard soldiers, a medic and an engineer (tasked to weld open shut doors). Image obtained by ZS.

Licensing: Fair use for Hazardous Environment Combat Unit
The author asserts that the image qualifies fair use for the following reasons:
 * 1) Valve Corporation has not released element-specific images into public domain.
 * 2) The image is necessary to describe the appearance of a Hazardous Environment Combat Unit team, as depicted in Half-Life: Opposing Force; nothing else.
 * 3) The screenshot is not intended to hinder the copyright owner's ability to sell the game.
 * 4) This image is a screenshot and thus immediately falls in fair use.