anchor.diff:  PAUSE
   EXIT /B 1
   
  -:iwad_freedom
  +:iwad_freedoom
   REM # if this was DOOM or DOOM2, we could use FreeDOOM instead
   SET "FREEDOOM="
   REM # TODO: check these files exist too
  
positive.code: :iwad_plutonia
  REM --------------------------------------------------------------------------------------------------------------------
  REM # are we looking for "Final DOOM: The Plutonia Experiment"?
  IF NOT /I "%IWAD%" == "PLUTONIA.WAD" GOTO :iwad_check
  
  REM # is Steam : Final DOOM installed?
  CALL :reg "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Steam App 2290" "InstallLocation"
  
negative.code: :pwad_nerve
  REM --------------------------------------------------------------------------------------------------------------------
  REM # are we looking for "No Rest for the Living"?
  IF /I NOT "%PWAD%" == "NERVE.WAD" GOTO :pwad_master
  	
  REM # is Steam : DOOM 3 BFG Edition installed?
  CALL :reg "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Steam App 208200" "InstallLocation"
  