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Half-Life: Uplink, released February 12, 1999, is one of two demos released by Valve for the original Half-Life video game. Half-Life: Uplink, is a standalone demo set in the Half-Life universe, and contained levels and a storyline not found in the full title.

Description from halflifeuplink.com

Half-Life: Day One is the initial pre-release demo of Half-Life. It was designed exclusively for OEM partnerships and was often bundled with graphics cards. Even though it was never available to the general public, it was leaked and Half-Life became one of the most talked about games before even releasing

Description from half-life.fandom.com

The Half-Life Oppfor Press Demo was sent to the press to preview Half-Life: Opposing Force before release.

  • This is build is older than the retail release by 17 days.
  • Requires a retail install of Half-Life patched to 1.0.1.3
  • Contains various model, sound, and code differences.
  • Multiplayer is disabled in the build, constantly returning the line "Multplayer games not allowed in this demo!"
  • Ropes require you to press the use key on them to mount.
  • The M249 holds 100 reserve ammo instead of the 50 it does in retail.
  • Files pertaining to the ending and the Sniper Rifle have been replaced with dummy files.

Description from hiddenpalace.org

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Half-Life: Uplink

Half-Life: Uplink

Demo 17 comments

This is one of the two demos released for Half-Life. The first one, called Day One, was just shipped with certain video cards and never released to the...

Half Life: Day One

Half Life: Day One

Demo

Half-Life: Day One is the initial pre-release demo of Half-Life. It was designed exclusively for OEM partnerships and was often bundled with graphics...

Opposing Force Demo

Opposing Force Demo

Demo

The demo version of Half-Life: Opposing Force was released after the game's release on March 4, 2000. It features portions of Welcome to Black Mesa, Friendly...

Opposing Force Press Demo

Opposing Force Press Demo

Demo

On September 21, 2021, Magic Nipples and Theuaredead released an October 1999 preview disc of Half-Life: Opposing Force, originally sent to press reviewers...

Post comment Comments
PsyWarVeteran
PsyWarVeteran - - 1,837 comments

Great mod.

Reply Good karma Bad karma+3 votes
IrisWasTaken Creator
IrisWasTaken - - 28 comments

not really a mod

Reply Good karma+1 vote
PsyWarVeteran
PsyWarVeteran - - 1,837 comments

Bingo.

Reply Good karma Bad karma+2 votes
dibdob
dibdob - - 1,328 comments

I've a small addon in my old archives called:
Half-Life: Uplink Addon 1.0.zip

It was meant to be used with:
"Half-Life Uplink Demo Lite (by Morpheus)

What is this?
: the single player levels ripped from the Half-life demo (including the scripting).
================================================================

This is from the uplink addon readme.txt:

Use this small archive in combination with Uplink Lite by Morpheus to play the demo as a Custom Game. Create an uplink subdirectory in your Half-Life folder and extract this archive with folder names activated into it. Then do the same with Uplink Lite and choose Uplink to play.

Wesp 17.4.2001

I don't need to post the two archives as you can find them easy enough if you google ,Fileplanet should still have them.

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