This final official major update solidified the game's ability to run without a CD. Modern digital versions (like those on GOG or Steam ) already include these updates, making them inherently "No-CD" from the start. Modern Solutions: Source Ports
The patch worked by bypassing the game's CD-ROM check, allowing players to load the game into memory and play without the need for a physical CD-ROM. The patch was not officially supported by id Software, but it was widely used by gamers who wanted to play the game without the hassle of a CD-ROM. Quake 3 Arena No Cd Patch