Half-Life: Opposing Force is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life. The game was developed by Gearbox Software and published by Sierra Entertainment on November 1, 1999. Opposing Force is the first expansion for Half-Life and was first announced in April 1999. Randy Pitchford, the lead designer on the game, later noted that he believed Gearbox was selected to develop Opposing Force because Valve wanted to concentrate on their future projects. Over the course of development, Gearbox brought in a variety of outside talent from other areas of the video games industry to help bolster various aspects of design. Opposing Force returns to the same setting as Half-Life, but instead portrays the events from the perspective of a U.S. Marine, one of the enemy characters in the original game. The player character, Adrian Shephard.

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Sandpit v4.0.1 (ZIP)

Sandpit v4.0.1 (ZIP)

Full Version

Sandpit v4.0.1 fixes stability issue in the previous release.

Sandpit v4.0 (ZIP)

Sandpit v4.0 (ZIP)

Full Version 7 comments

Sandpit v4.0 is a complete re-write of Sandpit on the latest version on the Half-Life SDK.

Echoes_v1.3.exe

Echoes_v1.3.exe

Full Version 5 comments

Half-Life: Echoes .exe file - Version 1.3 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes_v1.3.zip

Echoes_v1.3.zip

Full Version 56 comments

Half-Life: Echoes .zip file - Version 1.3 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes_v1.2.exe

Echoes_v1.2.exe

Full Version 4 comments

Half-Life: Echoes .exe file - Version 1.2 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes v1.2.zip

Echoes v1.2.zip

Full Version 13 comments

Half-Life: Echoes .zip file - Version 1.2 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes v1.1.zip

Echoes v1.1.zip

Full Version 25 comments

Half-Life: Echoes .zip file - Version 1.1 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes_v1.1.exe

Echoes_v1.1.exe

Full Version 9 comments

Half-Life: Echoes .exe file - Version 1.1 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes_v1.zip

Echoes_v1.zip

Full Version 26 comments

Half-Life: Echoes .zip file - Version 1.0 - Requires Windows and the Steam version of Half-Life

Echoes_v1.exe

Echoes_v1.exe

Full Version 20 comments

Half-Life: Echoes .exe file - Version 1.0 - Requires Windows and the Steam version of Half-Life

Opposing Force 2 Soundtrack

Opposing Force 2 Soundtrack

Music 1 comment

Soundtracks from the cancelled Half-Life 2 mod, Opposing Force 2.

Opposing Force 2 Mix

Opposing Force 2 Mix

Demo 4 comments

Every version of Opposing Force 2 mixed together into one file.

Sandbot v0.4.2

Sandbot v0.4.2

Full Version 27 comments

Beta release of Sandbot - a bot for Half-Life, Half-Life Opposing Force (deathmatch and capture the flag), Day of Defeat (territorial control), Gunman...

HL CTF Mod + HPB Bot with waypoints (DM and CTF)

HL CTF Mod + HPB Bot with waypoints (DM and CTF)

Full Version 1 comment

A CTF Mod Pack for Half-Life with HPB Bot and waypoints.

Opposing Force 2 - 2009 files

Opposing Force 2 - 2009 files

Demo 2 comments

in 2009, some rogue developer released the original files of the mod, it contains everything you can wish for, even if in early/beta version, such as...

Opposing Force 2 RED 1.35 demo version

Opposing Force 2 RED 1.35 demo version

Demo 4 comments

This is Opposing Force 2 « Red" Demo or 1.35 version, as released by NeverHolle Team.

Sandbot v0.4.1.1

Sandbot v0.4.1.1

Full Version 18 comments

Beta release of Sandbot - a bot for Half-Life, Half-Life Opposing Force (deathmatch and capture the flag), Day of Defeat (territorial control), Gunman...

Half-Life: Opposing Force Classic 1.0

Half-Life: Opposing Force Classic 1.0

Half-Life: Opposing Force Classic Full Version

This is the first version. There are some broken animations with some weapons, but so far everything's good.

Half-Life:Platinum Trailer

Half-Life:Platinum Trailer

Trailers

This is an official trailer for Half-Life Platinum:A collection consisting of Half-Life, Counter-Strike, Team Fortess Classic, and Half-Life:Opposing...

Sandbot v0.4.1

Sandbot v0.4.1

Full Version 4 comments

Beta release of Sandbot - a bot for Half-Life, Half-Life Opposing Force (deathmatch and capture the flag), Day of Defeat (territorial control), Gunman...

Sandpit v3.7.1 (ZIP)

Sandpit v3.7.1 (ZIP)

Full Version 29 comments

Fixed crash on map change (thanks SylvesterBarry@ModDB). Extract the .zip to steamapps\common\Half-Life\ and restart Steam to play.

Sandpit v3.7 (ZIP)

Sandpit v3.7 (ZIP)

Full Version 25 comments

Extract the .zip to steamapps\common\Half-Life\ and restart Steam to play.

Sandbot v0.4.0.1

Sandbot v0.4.0.1

Full Version 15 comments

Beta release of Sandbot - a bot for Half-Life, Half-Life Opposing Force (deathmatch), Day of Defeat (territorial control), Gunman Chronicles, Natural...

Parabot CB 0.92.1(Android)

Parabot CB 0.92.1(Android)

Full Version 11 comments

Custom Build of Parabot - Human-like Artificial player for Half-Life and some other games on GoldSrc and Xash3D game engines.

Parabot CB 0.92.1(Win32, Linux)

Parabot CB 0.92.1(Win32, Linux)

Full Version 14 comments

Custom Build of Parabot - Human-like Artificial player for Half-Life and some other games on GoldSrc and Xash3D game engines.

Worlds Collide's Music Fix [Steam]

Worlds Collide's Music Fix [Steam]

Music

This will fix the music problem for of6a5 when the elevator goes down in the chapter Worlds Collide (since it starts playing at of6a4b and it stops when...

Sandbot v0.3.1

Sandbot v0.3.1

Full Version 7 comments

Beta release of Sandbot - a bot for Half-Life, Half-Life Opposing Force (deathmatch), Day of Defeat, Gunman Chronicles, Natural Selection (Combat) and...

Sandbot v0.3.0.1

Sandbot v0.3.0.1

Full Version 7 comments

Beta release of Sandbot - a bot for Half-Life, Half-Life Opposing Force (deathmatch), Day of Defeat, Gunman Chronicles, Natural Selection (Combat) and...

Sandbot v0.3

Sandbot v0.3

Full Version 3 comments

Beta release of Sandbot - a bot for Half-Life, Half-Life Opposing Force (deathmatch), Day of Defeat, Gunman Chronicles, Natural Selection (Combat) and...

Xash studioMDL Goldsrc Large Model Compiler

Xash studioMDL Goldsrc Large Model Compiler

Modelling Tool 4 comments

Large Model compiler for Half-Life mods by Xash-Team. for more info please click

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Half-Life: Opposing Force
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