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This is a list of GoldSrc mods (modifications) for the video game Half-Life.

The list is divided into two categories: clientside and serverside mods. These terms do not necessarily indicate whether each mod can be run on multiplayer servers. Clientside mods add content to the game, such as a new storyline, models or sounds. In contrast, serverside mods add functionality.

The Half-Life serverside engine could originally only support one mod at a time, because it used to load a DLL which contained the standard engine as well as the mod.

Metamod is a serverside mod that fixed this, allowing multiple mods to be run at once. Many such mods run under Metamod, referred to as Metamod plugins.