So does Blizzard only have 2 of their games on the achievement system? I can find articles going back 8+ years saying they planned on adding them to every game.
I own all their games just hardly play them... no idea why I just like their vibe so I buy it early and then drop off but achievements showing up here for their games can drive me to play more.
I believe pretty much all their games after Warcraft 3 have achievements now. They only offer achievement APIs for two of them at the moment though.
Blizzard devs said an API for HotS and Overwatch is planned, so I'll definitely be able to add those when that happens. Maybe sooner on Overwatch, I'm looking at just using a third party API for that (presumably, it just scrapes the website for info - not ideal but it'll work).
Diablo 3 I know has achievements but as far as I can see the website doesn't display them anywhere, so haven't found any third party API for that one.