Speaking of Q1 . . . G1-3, D1-3, and Q1 is possibly the most amazing mission creep you can find in Dungeon & Dragons adventures.
G1 - go deal with these raiding hill giants. Hey, they have frost giant allies.
G2 - go deal with the frost giants. Hey, they have fire giant allies.
G3 - go deal with the fire giants. Hey, look, they have evil elf allies (introducing the Drow).
D1-3 - deal with the drow, and hey, they worship a demon queen and here's a magic egg that can get you to the Abyss.
Q1 - Go kill the drow's demon-goddess.
I've read that Q1 doesn't quite fit at the end. After all, the Lolth-worshipping drow aren't the ones stirring up trouble on the surface. That's true, although, there are some things that make Q1 fit:
- the mission creep I mentioned. The forces of good aren't much better off if the PCs whack the one drow clan causing trouble and remove part of the balance of power. But they're really well off if the PCs whack the entire drow power structure and slay their demon-god once and for all.
- the EGG. No surprises here, it's cursed, and essentially you're forced to go to the Demonweb. Oops.
- It's a good chance to strike at the heart of an enemy of law and order.
Plus, you know, after the previous six adventurers you're going to do what now? Go home and rest? Nah, just keep pressing on. Still, I'm amused how big the mission gets.