This page is for the original game. For the Source engine port, see Half-Life: Source. For the unofficial remake, see Black Mesa.
The official public demo for the game, it includes an exclusive chapter (and a training level) with content not found in the full release.
It can be downloaded here.
Note that the demo uses an older version of GoldSrc and may have compatibility issues with modern systems. For full compatibility, the SteamLink mod reworks the demo as a Half-Life mod.
A pre-release demo exclusive to OEMs, it contains the chapters from the full release up to and including "We've Got Hostiles" (5 chapters and a training level).
Note that the demo uses an older version of GoldSrc and may have compatibility issues with modern systems.
An unreleased port of Half-Life to the Sega Dreamcast, it includes various major and minor differences from the PC release (ex. modified levels, new models, adjusted difficulty, etc.)
A mod that ports the Dreamcast version as a Half-Life mod is available on Mod DB.
Use the -nointro command line argument.
You have multiple options to gain access to higher definition models. One is using the official version of them. For other options follow this guide.
Use the -dev command line argument.
+developer 1 +fps_override 1 +fps_max ###
connect "ip address"
In Windows 7 or Vista some users may experience extremely low frame rate during gameplay even if their PC can run other more modern games perfectly.
Follow these instructions to the problem:
The game should now allow you to play at 60FPS.
This should bring the Voice and Multiplayer tabs back to your Options menu.