Originally Posted by
Kittahsmash
But, to answer the OP's question, as long as you hit Exalted with a reputation before you knock it down to Revered/Honored/etc, it will still count for the achievement. Which is why some people do the cloth turn-ins to get their goblin reputation back up to neutral faster than just killing pirates/doing the DM key quest repeatedly. However, doing that will destroy your pirate reputation (but as long as you got the pirates up high enough to count for the achievement in the first place, you're fine with nuking them back to hated) so.. yeah.