Based on what Gary Gygax said and my #toee investigations, I think the idea would have been 2 different routes to get to the end game.
FIRST WAY
Giant series G1 G2 G3 then drow series
D1 D2 D3
Can not get to Q1 (Gary's version) unless you get to level 4 of Temple of Elemental Evil and accidentally release the Elder Elemental God to get the 4 elemental keys to unlock the way to Q1 (Gary's version)
Seems like the end of D3 would just plop you down at level 4 of Temple of Elemental Evil and then somehow go on to Q1.
SECOND WAY
T1 Vilage of Hommlet
The Ruined Moathouse
Fight through 3 levels of the Temple of Elemental Evil
Then you get to level 4, accidentally release the Elder Elemental God to get the 4 elemental keys to unlock the way to Q1 (Gary's version)
#dnd #rpg #ttrpg #osr #gygax #toee