I'm wearing a black tee shirt right now that has the "West of the house" opening description printed on it!
Playing Colossal Cave (Zork pretty much) on a DG mini started me out in the tech world back in the '70s.
I've had a pretty good career run since then, a lot of fun. I think playing Adventure was the most fun, so eye-opening of what could be done with computers.
I never played Zork, but on the MUDs that I have played (Viking Mud, Midnight Sun, Deeper Trouble) there were some ASCII 'graphics'. Perhaps this is what is meant?
I think the later games (maybe Zork 4) had graphics after INFOCOM sold off the IP. Something along those lines maybe. I've only played Zork 1 and that was text only.