To play Heretic on modern systems with high resolutions and better controls, you must copy the heretic.wad
: Some users host historical collections of WADs on the Internet Archive , though these often contain community-made levels rather than the commercial IWAD itself. How to Use the WAD with Modern Engines
Drakefall : A work-in-progress map pack with custom weapons and monster tuning.
file from your purchase into the directory of a modern "Source Port."
Most players use a "Source Port" to play the game on modern systems with high resolutions and better controls: