Which RPG cover best captures the spirit of the game?
This one is tricky, because the same game can have a very different spirit depending in who is running it or who is playing in it.
I did always think that the Rifts cover captured the strangeness and gonzo factor of the setting. It wasn't necessarily horrific, and it certainly fit into the genre of teenage boy fantasy. It seemed to fit the nature of most Rifts games I was a part of...certainly more than the sourcebooks which should have been more accurate in their cover depictions because they focused on a specific concept or location in the setting.