MIT-licensed ZIL source from https://github.com/historicalsource/zork1 at revision 97b7b3d68c075dd9af7da499c3e9690ada3471fd: zork1-97b7b3d68c075dd9af7da499c3e9690ada3471fd.tar.gz (Infocom's precompiled files omitted).
Built with ZILF 0.11.1. Interpreter source: Parchment 2026.8.23 (MIT).