Unlock All Chapters

All you'll be doing is making a quick edit to one of the configuration files in the HL2 directory. While this is easy to reverse you may want to backup the file first if you have any concerns.

  1. Use a text editor to edit the "config.cfg" file in the "\hl2\cfg" directory.
  2. Locate the "sv_unlockedchapters" line and change its value to "15".