There is broad agreement in aesthetics that some artworks are greater than others despite bearing equivalent (or lesser) aesthetic value. One explanation of this difference in artistic value is that creation of the greater artwork represents a greater achievement. The aim of this article is to refine this explanation and to defend it against recent criticisms. First, I present a prima facie case in favor of the achievement explanation. Second, I draw on the history of photography to motivate three objections (...) to it: namely, that it wrongly excludes (1) lucky, (2) easy, and (3) failed creations from being artistically great. Third, I present my refined version of the achievement explanation and show how it avoids these objections. On my view, an artistic achievement consists in creating a work it would have been especially hard for comparable artists to create. Finally, I raise and address several additional objections. In responding to these objections, I argue, among other things, that my explanation of artistic value enhances our understanding of good-bad art: specifically, it allows us to see how good-bad art is artistically great despite being aesthetically flawed. (shrink)