Most mods come in a .7z or .rar archive. When you extract it, you will see a folder with the mod’s name (e.g., EntropyZero, NightmareHouse2, RaisingTheBar).
Crucial rule: This folder must sit alongside the hl2 folder, not inside it.
Correct structure:
C:\Games\Half-Life 2\hl2\ <-- Original game files
C:\Games\Half-Life 2\EntropyZero\ <-- Mod files
Since you don’t have Steam, you cannot use "Launch Options." Instead:
Example:
"C:\Games\Half-Life 2\hl2.exe" -game EntropyZero half life 2 mods non steam repack
Repacks are pre-configured versions of the game that include mods or modifications. Non-Steam repacks of Half-Life 2 with mods can be found on various gaming forums and file-sharing sites. However, be cautious:
A reconstruction of the original Half-Life 2 beta (the 2001-2003 version). It uses standard sourcemods structure. Ensure you download the pre-compiled version, not the source code. Most mods come in a
Many users don't know that the Source engine natively supports a secondary mod directory. Even with a repack, you can create a sourcemods folder.
Note: This method is finicky with repacks that use cracked Steam emulators (like Goldberg or SmartSteamEmu). Since you don’t have Steam, you cannot use "Launch Options
The grandfather of HL2 mods. SMOD changes weapon handling, adds gore, and slows time. The "SMOD Redux" version is specifically designed for non-Steam users. Just correct the gameinfo.txt to point to your repack’s hl2 folder.
If your mod fails to launch, diagnose with these fixes: