You may notice that I also played text adventures (without PC, with book, preferably by Tolkien...) decades ago... ;-)

It was the books that inspired me to create the game. I can't remember who they were written by but I would have a character and would have to roll dice for the battles. The options would say "Go to page..." I spent so much of my time reading them.

It probably wouldn't be difficult to accept a "{Join}" command within somebody else's game

Why not?

I'll have to really think about how it could work well. I wouldn't want it so that one character races ahead and kills all of the zombies. And I'd have to do something so that if the first player dies, the game can continue. It's all doable... There are a few characters that you can meet on your journey... I wonder if I can make it so that they can be Steemit users 🤔 It could be tough.

I have had another idea which would see players compete against each other which I think would be a lot of fun. Along the lines of Athletics where you choose which event(s) your character can enter and then competes against them (recording Personal Bests, National and World Records (you choose your nation when you create your character)). I've mapped out the game already but need to finish Steemit City first 🙂