This page details pre-release information and/or media for Half-Life: Opposing Force.
While Half-Life: Opposing Force may have had a very short amount of development time, there's still quite a lot of pre-release media to be found, mainly screenshots.
Concept Art#
A single piece of concept art for the Cleansuit Scientists. The "Glasses" scientist (also known as "Walter") is shown wearing a Cleansuit here.
Screenshots#
Various screenshots taken before the game's release, with a few "scripted" images here and there.



Installer Images#
Images taken from the expansion pack's installer executable file, before it and all other Half-Life games (except Decay) moved to Steam.




Trailers#
TV Spot#
A teaser trailer for Half-Life: Opposing Force, being just 46 seconds long. It has some differences from the released game.
- 0:27 - The sniper rifle uses the MSG90 sniper model from the Action Half-Life fan mod as a placeholder, and is shown with three levels of zoom instead of just one.
- The Desert Eagle uses an earlier firing sound and reuses reloading sound effects from the Glock.
- Otis uses his earlier face design.
Release Trailer#
The release trailer for Opposing Force, showing gameplay and quotes said by various gaming magazines of the time.