How to explore the code of Roshpit Champions
This method will work for any custom game that you want to browse
1. Download GCFScape
Download GCFScape at http://nemesis.thewavelength.net/?p=26
2. Open Roshpit Champions VPK
The path where you will find Roshpit Champions is:
Open the VPK inside the folder and now you can see the source code of Roshpit Champions!