500+ hours may have been put in, but it is 20 or so hours of story content repeated (I know because I started and played through with a fresh toon for my ExtraLife 24hr gaming marathon this year, finishing the game before my marathon was over). The initial raids might add in a bit more time, but after that, it is again repeating the same content over and over. Fallout 3, a game that is years old, had about 40 hours or storyline content with many more hours of things to do on the side. THEN, DLC was added to add even more stuff and earn some more cash for the devs/pubs. Just an example of how the DLC economy has been changing.