One level for any boom compatible and limit removing ports. PrBoom-Plus or GZDoom are recommended. To play this PWAD file, unzip it into the directory with your PWADs then start: glboom-plus.exe -file epic.wad -complevel 9 (g)zdoom.exe -file epic.wad Important: Do not play map05 in the current prboom (up to 2.4.8 for now), because of: a) All existing versions of prboom are buggy on levels with big open areas - precision problems. The latest Eternity release