- Quake1 shareware: https://archive.org/download/Quake_802
- Get started: https://quakewiki.org/wiki/Getting_Started#Download_the_shareware_edition_of_Quake
- Quake file format: https://quakewiki.org/wiki/Quake_file_formats
- BSP29 format: https://github.com/joshuaskelly/vgio/blob/master/vgio/quake/bsp/bsp29.py
- BSP17 format: https://www.gamers.org/dEngine/quake/spec/quake-spec34/qkspec_4.htm
- Michael Abrash's black book: https://github.com/jagregory/abrash-black-book