Certain glitches used in speedruns are only possible on specific older engine builds.
While the modern Steam version of Half-Life is the most accessible way to play, version 1.1.0.8 remains the "purest" version of the game that defined a generation of PC gaming. File: Half-Life.v1.1.0.8.zip ...
Before Steam, Half-Life relied on the for its multiplayer matchmaking. Version 1.1.0.8 was the definitive version of this era. For many players, this specific file is a "time capsule" of the game's original feel, before engine updates and platform changes altered movement physics and netcode. Key Features and Fixes Certain glitches used in speedruns are only possible
Improved the "lag compensation" which, while primitive by today's standards, was revolutionary for players still on 56k dial-up modems. Legacy and Modern Use Today, this specific ZIP file is often sought after for: Version 1