Are 3e books still useful for 4e campaigns?

[mburr0003]

Originally Posted by Filaristil

Hi, I'm just wondering if books designed for 3rd edition are still useful for 4th edition campaigns.

Yes, basically anything that hasn't been redone for 4e. But mostly the Historic Setting books, they are usable with virtually no updating needed. The more "setting" or 'creature' source books will take more updating, Like Cabal needs some working on the magic system and Shapeshifters need heavier updating with modern Advantage and Power pricing.

Most older NPCs can be ported straight over (if you're willing to ignore character point total changes), just mind the change in defenses and possibly think about the swap in HP-FP.