: The most reliable way to play without Steam is through the WON2 project , a fan-made network that preserves the original Half-Life and its mods. You will need a retail Half-Life CD and the WON2 patch to access modern community servers.
Extract it to a folder like C:\DMC_Server .
If you cannot use Steam at all (e.g., you live in a country with Valve blocks, or you run Linux via Wine without the Steam client), your only safe option is the from eBay.
No official non-Steam version exists. Avoid shady “no Steam” downloads — they are unsafe and illegal to redistribute.