Yep, the original Zork was a big sprawling game. I originally played the (pirate?) pdp version when I was like 6 years old. A few years ago I took one of the c versions (this one one was run through f2c and then cleaned up by Ian Lance Taylor) and ported it to wasm. I also added in a mapping system using my favorite dungeon map. You can play it at https://dungeo.org/