File:HL BMRF Biodome observation area.jpg

Summary
A biodome area studying Xen aliens and habitats in the Black Mesa Research Facility, in the first-person shooter computer game, Half-Life: Opposing Force. Image obtained by ZS.

Licensing: Fair use for Black Mesa Research Facility
The author asserts that the image qualifies fair use for the following reasons:
 * 1) Valve Corporation and its affiliated have not release game screenshots into public domain.
 * 2) The image is necessary to describe the game's graphics engine and its capabilities; nothing else.
 * 3) The screenshot is not intended to hinder the copyright owner's ability to sell the game.
 * 4) This image is a low-resolution screenshot, within its namespace.