User blog comment:Juper0/Achievements/@comment-3157150-20150302093656

That would be something you'd likely need to pitch to Re-Logic. I really wouldn't see the point in adding achievements to Terraria, even as a purely aesthetic thing; but that's only my opinion. The implementation you're leaning towards would be impossible for Steam/XBLA/PSN to code, as their achievements are purely on a per-game basis. If you're thinking of achievements like how Minecraft manages them, then it would have to be integrated by the game developers, and I can hardly see any good reason for them to put the time in that hooking these values would take.