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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10 years ago the first version of Sandpit was released - it wasn't much - just the spawn menu and a few monsters from Half-Life, all based off some VGUI tutorials by Richard Zad at The Wavelength. For the next few years Sandpit got lots of updates with lots of features but by 2010 other projects (like Sandbot) had started to take up more time.

Sandpit's improved posing capabilities

In 2013 full-time work rolled around and not a lot of programming got done for fun anymore, but the updates to Half-Life and the release of the updated SDK re-ignited some interest and Sandpit started getting some more attention again. In the background, work on Basis got moved to new Half-Life SDK.

Sandpit's spawn menu

In 2015 a new job meant more desire to finally get Sandpit v4 to happen. Until then nothing had really been done beyond patching a code-base that was very obviously messy and in need of some love. Basis was tidied up and released publicly in 2015 and in 2016 and a new Sandpit was forked off Basis to take advantage of the fixes and structure that it brought. Work continued slowly for the next little while, but by the second half of 2018 it was still far from completion. The looming 10 year anniversary of Sandpit meant a lot of work got done in September, October and November of 2018 to get the most important features done in time.

Sandpit's spawn menu

In spite of best efforts, there was still an annoying bug in v4.0 that couldn't be reliably reproduced during testing and so a day later v4.0.1 was released to fix it.

There's still lots more planned for Sandpit (follow Sandpit to stay informed) - here's to another 10 years!

P.S. there are still two days left to vote for Mod DB's Mod of the Year - vote for Sandpit at Moddb.com

Half-Life : Echoes Release - Thank you

Half-Life : Echoes Release - Thank you

News 21 comments

A massive thank you to everyone who played and enjoyed my mod.

Half-Life: Echoes has been released!

Half-Life: Echoes has been released!

News 51 comments

After 20 years of enjoying everything that the Half-Life community has had to offer, I am incredibly happy to finally release my own contribution to you...

Half-Life : Echoes Release Date and Trailer

Half-Life : Echoes Release Date and Trailer

News 49 comments

Playtesting is complete. A release is imminent. Come check out the trailer!

Half-Life : Echoes final polish

Half-Life : Echoes final polish

News 31 comments

A complete version of Echoes is being play-tested for final bug testing and polish. I will be releasing soon.

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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.

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jonatasv
jonatasv

a guy from the modb community made a unofficial blue shift port for ps2, it will be possible to leave an unofficial port of opposing force for ps2
his name is supadupaplex
I also saw and already played a game that you enter into the skin of a black table visitor, the name of the game is half life visitors, he is in this group to download, works only via steam, it will be possible someday convert it to ps2.
Nothing, as you can dream

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Leonioruc
Leonioruc

One of the best expansions of the original Half-life story.

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Lateralus10k
Lateralus10k

Opposing Force is Canon.


Fight me.

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taakuu
taakuu

Hi all, if you want a great CTF mod with bot, it’s here : Moddb.com

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Fakistill
Fakistill

Are there any subtitle mod?

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_revenant.4K
_revenant.4K

The only game i liked (along with Blue Shift) from Gearbox ever since.

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SweetJuleka
SweetJuleka

I take it that you didn't enjoy Borderlands or Halo Combat Evolved?

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Blue199
Blue199

or just didn't play them

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Half-Life: Opposing Force
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Gearbox Software
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Highest Rated (3 agree) 10/10

One of the best Expansion Packs out there for any PC Game!

Jan 15 2018 by SweetJuleka

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Half-Life: Blue Shift
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