If you are trying to beat the record for “most rooms in a text adventure”, I’m afraid you’ve got a long way to go - Level 9’s Snowball has more than 7k rooms.
> The game is advertised as having more than 7.000 locations. In reality there are about 200 unique locations and the rest is part of a maze with exact locations.
[1] https://spectrumcomputing.co.uk/entry/6993/ZX-Spectrum/Snowb...
But big MUDs usually have "builder" teams so the comparison is unfair. However, these numbers have hardly been matched by game studios - WoW or Runescape comes to mind. And then there's Dwarf Fortress which reaches the infinite in some categories thanks to procedural generation.
[1] https://www.aarchonmud.com/arc/features
[2] https://www.mudportal.com/listings/by-genre/hack-slash/item/...
Collaborative building over decades adds up!