{{DISPLAYTITLE''Half-Life Opposing Force'' soundtrack}}
{{Article|rw|hl1}}
{{Cleanup}}
The '''''Half-Life Opposing Force'' soundtrack''' was composed by Chris Jensen. It was reused for the Half-Life Blue Shift soundtrack|''Half-Life Blue Shift'' soundtrack.
It is possible to extract all audio tracks heard in-game in the Steam version by navigating to steamapps\common\Half-Life\gearbox\media.
Names of the majority of the original tracks were revealed with the release of ''Blue Shift''. Additionally, those previously named received new titles. When a track has multiple names, the ''Opposing Force'' title is listed first.
Originally, the Steam versions of ''Blue Shift'' and ''Opposing Force'' did not use their original soundtracks, but instead the ''Half-Life soundtrack'' by Kelly Bailey. This was, however, corrected when both games converted into the SteamPipe distribution system.
==Behind the scenes==
*The music was made with old equipment, including an analog 4-track recorder.https//groups.google.com/forum/#!topic/ccsfgss/eoEyH-ssbEA Hey Classmates - From Chris Jensen on Google Groups (September 19, 2011)
*Several tracks were cut from the soundtrack. One of them, titled "http//www.youtube.com/watch?v=LmwwconovQU&t=1m33s Mishaps In The Reactor Chamber Part 1 - Track 03", was reused by Jensen for the ''Half-Life 2'' http//www.youtube.com/watch?v=GUw33CwqE_I E3 2002 trailer. Jensen uploaded the tracks on his https//soundcloud.com/emo-999919 SoundCloud account in 2014 at the instigation the wiki after having been contacted several years prior about his credits for the music of the ''Half-Life 2'' E3 2002 trailer. They have been removed since then.
==Track listing==
{| class="wikitable grid sortable plainlinks" width="100%" style="width 100%; text-alignleft"
|-
! class="header" width=" 5%"| Game #
! class="header" width=" 5%"| OST #
! class="header" | Track title
! class="header" | Filename
! class="header" width=" 5%"| Time
! class="header unsortable" | Level location
! class="header unsortable" | Comments
|-
| valign=top width="70px"| 01
| valign=top width="70px"| 02
| valign=top width="80px"| ''Scientific Proof''
| valign=top| Half-Life01.mp3
| valign=top width="80px"| 017
| valign=top| '''''Half-Life Opposing Force storyline 1 Incoming|Incoming''''' Played during the opening scene aboard the Osprey.
| valign=top|
|-
| valign=top| 02
| valign=top| 03
| valign=top| ''The Awakening'' / ''Orbit''
| valign=top| Prospero01.mp3
| valign=top| 111
| valign=top| '''''Half-Life Opposing Force storyline 2 Welcome to Black Mesa|Welcome to Black Mesa''''' Upon exiting the Black Mesa Medical Lab.
| valign=top|
|-
| valign=top| 03
| valign=top| 04
| valign=top| ''Name''
| valign=top| Half-Life12.mp3
| valign=top| 154
| valign=top| '''''Half-Life Opposing Force storyline 2 Welcome to Black Mesa|Welcome to Black Mesa''''' Upon encountering the Vortigaunt corpse with the Combat Knife impaled in its back.
| valign=top|
|-
| valign=top| 04
| valign=top| 05
| valign=top| ''Spooky Oozings'' / ''Listen''
| valign=top| Half-Life07.mp3
| valign=top| 017
| valign=top| '''''Half-Life Opposing Force storyline 2 Welcome to Black Mesa|Welcome to Black Mesa''''' Upon falling into the pool of water immediately after entering the sewers of the Black Mesa Transit System.
| valign=top|
|-
| valign=top| 05
| valign=top| 06
| valign=top| ''Fright''
| valign=top| Half-Life10.mp3
| valign=top| 103
| valign=top| '''''Half-Life Opposing Force storyline 3 "We Are Pulling Out"|"We Are Pulling Out"''''' During the tram ride.
| valign=top| This is the only track to not be used in ''Blue Shift''.
|-
| valign=top| 06
| valign=top| 07
| valign=top| ''Storm''
| valign=top| Suspense01.mp3
| valign=top| 138
| valign=top| '''''Half-Life Opposing Force storyline 3 "We Are Pulling Out"|"We Are Pulling Out"''''' When the hangar access door begins to shut close and the G-Man appears.
| valign=top|
|-
| valign=top| 07
| valign=top| 08
| valign=top| ''Spectre of Limbo'' / ''Trample''
| valign=top| Suspense03.mp3
| valign=top| 120
| valign=top| '''''Half-Life Opposing Force storyline 4 Missing In Action|Missing In Action''''' When entering the test flame area.
| valign=top|
|-
| valign=top| 08
| valign=top| 09
| valign=top| ''Race from Doom'' / ''Bust''
| valign=top| Half-Life09.mp3
| valign=top| 149
| valign=top| '''''Half-Life Opposing Force storyline 5 Friendly Fire|Friendly Fire''''' While encountering a group of Black Ops near the rail transit system.
| valign=top|
|-
| valign=top| 10
| valign=top| 10
| valign=top| ''Temple of Limbo'' / ''The Beginning''
| valign=top| Half-Life02.mp3
| valign=top| 207
| valign=top| '''''Half-Life Opposing Force storyline 7 Crush Depth|Crush Depth''''' While entering the elevator before rescuing the scientist in the teleport at the beginning of the chapter.
| valign=top|
|-
| valign=top| 11
| valign=top| 11
| valign=top| ''Wastes of Limbo'' / ''Lost in Thought''
| valign=top| Half-Life13.mp3
| valign=top| 122
| valign=top| '''''Half-Life Opposing Force storyline 7 Crush Depth|Crush Depth''''' While entering the room with the broken x-ray, immediately before Adrian's first fight with a Shock Trooper.
| valign=top|
|-
| valign=top| 09
| valign=top| 12
| valign=top| ''Danger Rises''
| valign=top| Half-Life04.mp3
| valign=top| 117
| valign=top| '''''Half-Life Opposing Force storyline 6 We Are Not Alone|We Are Not Alone''''' Upon entering Xen for the first time.
| valign=top|
|-
| valign=top| 12
| valign=top| 13
| valign=top| ''Open the Valve''
| valign=top| Half-Life15.mp3
| valign=top| 127
| valign=top| '''''Half-Life Opposing Force storyline 8 Vicarious Reality|Vicarious Reality''''' When a Shock Trooper and Pit Drones teleport into the Observation Area of Biodome 02.
| valign=top|
|-
| valign=top| 13
| valign=top| 14
| valign=top| ''Stroke of Midnight'' / ''Run''
| valign=top| Half-Life14.mp3
| valign=top| 054
| valign=top| '''''Half-Life Opposing Force storyline 9 Pit Worm's Nest|Pit Worm's Nest''''' Upon dropping from the air vent at the beginning of the chapter.
| valign=top|
|-
| valign=top| 14
| valign=top| 15
| valign=top| ''Tunnel''
| valign=top| Half-Life16.mp3
| valign=top| 125
| valign=top| '''''Half-Life Opposing Force storyline 10 Foxtrot Uniform|Foxtrot Uniform''''' Upon entering the sewer maze populated by Voltigores.
| valign=top|
|-
| valign=top| 15
| valign=top| 16
| valign=top| ''Soothing Antagonist''
| valign=top| Suspense02.mp3
| valign=top| 126
| valign=top| '''''Half-Life Opposing Force storyline 10 Foxtrot Uniform|Foxtrot Uniform''''' When approaching the Sector G Hydro Plant|Hydro-Electric Dam.
| valign=top|
|-
| valign=top| 16
| valign=top| 17
| valign=top| ''The Ticking Timebomb'' / ''Chamber''
| valign=top| Half-Life03.mp3
| valign=top| 159
| valign=top| '''''Half-Life Opposing Force storyline 11 "The Package"|"The Package"''''' Upon approaching the Mortar (weapon)|Black Ops mortar.
| valign=top|
|-
| valign=top| 17
| valign=top| 18
| valign=top| ''Maze''
| valign=top| Half-Life08.mp3
| valign=top| 059
| valign=top| '''''Half-Life Opposing Force storyline 11 "The Package"|"The Package"''''' While riding the lift at the end of the chapter.
| valign=top|
|-
| valign=top| 18
| valign=top| 19
| valign=top| ''Alien Forces''
| valign=top| Prospero02.mp3
| valign=top| 205
| valign=top| '''''Half-Life Opposing Force storyline 12 Worlds Collide|Worlds Collide''''' While riding down the lift to the battle with the Gene Worm.
| valign=top|
|-
| valign=top| 19
| valign=top| 20
| valign=top| ''Planet''
| valign=top| Half-Life05.mp3
| valign=top| 131
| valign=top| '''''Credits'''''
| valign=top|
|}
==References==
{{Reflist}}
{{RW}}
CategorySoundtracksCategoryHalf-Life Opposing Force