MUCKs tend to be primarily social; any "game mechanics", beyond absolute core functionality like movement and communication, exist only by consent of the player

MUCKs tend to be primarily social; any "game mechanics", beyond absolute core functionality like movement and communication, exist only by consent of the players. Game balance isn't really a concern. Second Life and VRChat roughly follow this model as well. Roblox worlds are more isolated, kind of along the lines of what you're describing for NWN.