There is a lot to be said for a game’s artwork. Remember how Brom’s work shaped TSR’s Dark Sun campaign? Or Tony DiTerlizzi’s artwork for Planescape? Glorantha, in its many incarnations, has offered images from many artists’ pens. I find Marc Moreno’s illustrations to be one of the best thematic imagery I’ve seen. These scans are from HeroWars: Roleplaying in Glorantha (Issaries, Inc., 2000).