File:Test chamber AYool.jpg

Summary
The test chamber in the Black Mesa Research Facility. The equipment in the centre of the screen includes an anti-mass spectrometer. Gordon Freeman's job is to insert a mineral sample into it.

Licensing: Fair use for Black Mesa Research Facility
The poster of the rationale asserts that the image qualifies fair use for the following reasons:
 * 1) Valve Corporation has not release location-specific images into public domain.
 * 2) The image is necessary to describe the appearance of a unique location in Black Mesa Research Facility; nothing else.
 * 3) The screenshot is not intended to hinder the copyright owner's ability to sell the game.
 * 4) This image is a game screenshot.