So, ich glaube, der Verweis meint diesen Abschnitt:
Characters from other role-playing games appear on Al-Amarja. They are characters from basic games played by neophytes. For instance, imagine an elfin thief who comes to the bar looking for adventure. He carries gold pieces, each stamped "1 g.p.", talks about, what "level" he is, and says he only needs one more "experience point" before going up to the next level, so he wants to know if there are any small monsters around that he can kill. Perhaps he brags about his "+2 dagger" and "68% chance to pick locks." Eventually he realizes he is in the wrong world (there are no experience points on Al Amarja, so he can't raise his level while he's here), so he goes through a door and disappears. If the PCs fight the role-playing characters, you might want to use the "alien's " rules for combat when they attack, just to be strange.