Open the Source SDK application from Steam's Tools menu.Please note that in order to get the latest source code, you must refresh the SDK content. 'Quickmod', 'TreasureTroll', 'Old Man With Melons Mod', etc.) When you make your own mod this can be any name you wish (i.e. Now what?įor the purpose of this tutorial we will call our first mod, 'Mymod'.