Since the original site is down, is currently the most popular and maintained method for running IW4x. Go to the official AlterWare GitHub . Download the alterware-launcher.exe . 3. Run the Launcher Move the alterware-launcher.exe into your MW2 game folder. Double-click the launcher to run it.
With IW4X installed, you do not use the "Find Match" button. That is broken. iw4x install
If you already own the base game on Steam, this is the quickest method: Locate your game folder : In your Steam library, right-click Modern Warfare 2 Browse local files Download the Launcher : Get the latest iw4x-launcher.exe if required) from the official GitHub repository Deploy files : Drag the launcher into your main MW2 directory (where is located). Run and Update Installing iw4x: A Deep Guide for Modded Call