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.

Description

With this program you can make maps for any GoldSrc engine game.

Preview
Valve Hammer Editor 3.4
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~Mapster(WFc)
~Mapster(WFc) - - 806 comments

There is also an optional 3.5 beta update hidden around the internet that is well worth the trouble finding it and the updated .fgd's for the games you want to map for..

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JCDenton2000
JCDenton2000 - - 267 comments

Here's a link to a download on cstrike-planet.com. It requires Hammer 3.4 of course installed beforehand, as it is a patch.
Cstrike-planet.com
It SHOULD work.

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Suparsonik
Suparsonik - - 1,267 comments

Why are you using a picture of Source Hammer?

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thelighgod
thelighgod - - 31 comments

this is a cool map creator

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ExtraMana
ExtraMana - - 77 comments

Doesn't install. The file is over a dozen years old. Good luck getting it running.

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HashtagMC
HashtagMC - - 49 comments

Huh. It works, which is cool, because I need it to work with Opposing Force, but... what the ****. What a downgrade from Source hammer. So many things that are way more complicated with GoldSrc hammer (like "what do you mean I can't scale the entity properties window?"-complicated). I'm glad it works, though.

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cumguy(real)
cumguy(real) - - 15 comments

Does this work with Half Life: Source? Reply as soon as possible please!

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lucianoends
lucianoends - - 147 comments

noooooooooooooooooooooo.

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Guest
Guest - - 687,512 comments

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Johanazo
Johanazo - - 7 comments

I want to place more weapons in the HL1, in LAN mode and alone,

(in the hammer, but I don't know how to do it)

when placing the Weapon_xxx in the hammer does not appear on the map when compiling, the weapon disappears, I don't know how everything the process

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