Quote Originally Posted by Sucuri View Post
As far as I know, you can still buy the expansion on Steam, it gives you a code to activate on your account, not 100% sure how that all works, I bought my stuff through SE's website (where PC and PS versions were both on sale).
Steam version is not compatible even with the "regular" PC version, so unfortunately that doesn't work. If you play on PS3 and have the PS3 version of ARR, you'll need PS3 version of Heavensward.