Rune.txt

Rune
 - download from steam
 - download rune extended patch (https://www.moddb.com/games/rune/downloads/rune-extended-mod-for-missing-levels)
 - backup Maps folder in ""C:\Program Files (x86)\Steam\steamapps\common\Rune Classic" directory
 - remove "_CUT" from these files in "C:\Program Files (x86)\Steam\steamapps\common\Rune Classic\Maps" directory
  + DeepUnder1OdinB_CUT
  + DeepUnder4_CUT
  + DwarfMap3A_CUT
  + DwarfMap3B_CUT
  + DwarfMap5A_CUT
  + Goblin1_CUT
  + Hel3b_CUT
  + Hell2End_CUT
  + Mountain1_CUT
  + ThorMap4B_CUT
 - install rune extended map files into "C:\Program Files (x86)\Steam\steamapps\common\Rune Classic\Maps" directory

OpenAL patch causes crash at launch

OpenAL patch from OldUnreal
 - download openal patch (http://www.oldunreal.com/phpBB3/viewtopic.php?t=453&sid=5c9cb58fc7a3da22822d5323e624d1d5)                    
 - install openal patch into "C:\Program Files (x86)\Steam\steamapps\common\Rune Classic\System" directory

OpenAL patch from PCGamingWiki
 - community.pcgamingwiki.com/files/file/2671-openal-3d-audio-driver-fix-for-rune-classic/
- install openal patch into "C:\Program Files (x86)\Steam\steamapps\common\Rune Classic\System" directory