I think Vanilla World of Warcraft’s starter areas should qualify. They gradually expanded the scope of the world and systems in such a fluid way ending with getting to the 'big city." If you think about the subscription numbers from EQ and what the pundits at the time said a MMORPG could sustain (500K) vs. WoW’s 10 million, I would argue that the starting zones/tutorial were the most important part in the equation. 9+ million first time MMORPG customers did not bounce off the first hour and stuck around long enough for the hook to set.