Half-Life: Opposing Force

Half-Life: Opposing Force, an expansion to Half-Life showing the same story from a soldier who kicks some alien ass. Much like Gordon Freeman does.

Unused Sounds
An old reveille sound file which was cut from the final game. This version of the reveille horn is a little duller, and doesn't have as much reverb as the one in-game.

An unused marine dialogue file that would've been played at the intro while you're in the helicopter.

An unused sound file from Otis that would've been played while he opened the door for you to the laser room.

Another unused sound file from Otis, but it would've been able to be triggered on every Otis NPC.

A slightly different variant of the "We Are Pulling Out" radio transmission voice.

An unused sound file in which Otis gets curious of a gun the scientists are working on. Did the scientist from the original Half-Life survive the last gun incident?

A dying soldier tells Shephard "That monster killed my squad"; possibly the Pit Drone.

This voice clip contains the drill instructor saying the famous bubblegum quote from the movie They Live.

Hidden Hack Texture


If the player uses a console command to view the skybox from within the V-22 Osprey during the G-Man sequence, there is a hidden message on the upper skybox texture. The message reads: "HACK HACK HACK ALL DAY LONG. HACK HACK HACK WHILE I SING THIS SONG" This poem is a reference to Adam Sandler's song, The Beating of a High School Janitor. This can also be found by viewing the game files. It probably references to the fact that the player has to "hack" the game to see the text, as in using the console.