How to decompile Valve Portal Maps

Introduction

In this step-by-step tutorial, you will learn how to decompile Valve's Portal maps.

Tutorial

1. Install GCFScape (you can find out about it here).
2. After you install GCFScape, go to File>>Open. Open C:\Program Files\Steam\steamapps\username\portal content.gcf.
   Note:This may not be your directory. If it isn't, go to the discussion page and your questions will likely be answered.
3. Go to the maps folder.
4. The Portal map .bsp files are here. Right-click on the one you want, then click Extract.
5. Now, open VMEX and decompile the map. When you open it with the Hammer Editor, the map should be there.

See also

• Decompiling Maps
• Valve Map Extractor