AMX Mod (Abstract Machine eXecutive Modification) is a Metamod plugin which allow users to write modifications for Half-Life with Small scripting Language. Metamod is a modified DLL (Direct Link Library) that replaces the stock version and allows external plug-ins (such as AMX) to interface with the game. It is a plugin/ DLL manager between the Half-Life Engine and an HL Game mod. Half Life (HL) is a science fiction video game developed by Valve Corporation for Windows PCs, and PlayStation 2. Versions for Mac OS X and Linus ports became available in January 2013. The game is a first-person shooter that requires players to perform puzzle solving and combat tasks to advance through the game. Metamod allows the dynamic loading/unloading of mod-like DLL plug-ins to add functionality to the HL server or game mod. Installing AMX Mod require the installation of MetaMod. Downloading Metamod requires Windows or Linux operating systems.