Adventure Paths: Which are Pathfinder, and which are not?

[Red Silvers]

Basically I'm wanting to know which of the older Adventure Paths are built for the Pathfinder rules, and which of the them use older rules.

[Kvantum]

Curse of the Crimson Throne, Second Darkness, and Legacy of Fire are all still 3.5 D&D/OGL. Also the 6 individual volume version of Rise of the Rune Lords, but the new all-in-one anniversary edition is PfRPG. All the rest, from Council of Thieves on, are PfRPG.

(Converting the older APs is not really all that hard, so if you like one of them, go for it anyway. You'll have a blast.)

[Coridan]

Shackled City, Age of Worms and Savage Tide, the Dungeon magazine era APs are also 3.5 (in fact the first 3 or so adventures of Shackled City in magazine form are 3.0, though the hardcover is 3.5)

[Abba]

Everuthing is correct. Converting the adventures written as 3.5AP is not so difficult however. Of course you need to change some monster or villain class.. but it isn't difficult. It can be a litle bit long.