After you have installed Source SKD or the L4D1/2 Authoring Tools open it up by double clicking on the SDK or Authoring Tools. Choose the game you want to create custom maps for and Launch theHammer World Editor. Update:You no longer need to install L4D2 Addon Support....
Q1: How do I add a map to the workshop? A1: Open the developer console in the game and enter the command “workshop_publish”. In the “BSP File:” select “csgo” then “maps”, select the previously saved map, and click “Publish”. Q2: How do you make a map on Counter-Stri...