I played this text adventure game on a BBS about thirteen years ago. It was more like a MUD than, say, Zork, but wasn’t multi-user. I know I played a wizard type because I used spells to fight with, but I can’t remember if there were different classes to choose from.
I remember that early on, you went into the woods and fought a giant spider, which may have sometimes dropped a ring. Then much, much later in the game, there was a rainbow which had centaurs to fight in it, and you walked from band to band, I believe.
I doubt anyone else hung out at the same place, but just in case, it was the CentralTech BBS in the 315 area code.