Gotcha!
Pumpking
No offense, buddy, but the topic title is: If You Could Add An Achievement To Terraria, What Would It Be?Iunno, I already think the treasure bag awards are good enough. I suppose difficulty achievements are natural, but I have seen many players of all playing ability do whatever they want, and I think a subtle difference for this is a lack of achievement dependent on difficulty mode rather than simple progression.
So if I could add an achievement to Terraria, then that's what it'd be. I'm just saying what I would add, my personal preference; I'm not making a suggestion here.