What Creatures "Break" A Fantasy Game World For You?

[Fenes]

Robots and other high-tech creatures/stuff break a fantasy game world for me (with the exception of those like shadowrun, set in modern times).

 

[Keefe the Thief]

Nothing breaks a D&D fantasy world for me. I mean, it´s D&D. You know, as in, fantasy pulp with style. "Kung-fu Jesus vs. Disco Hitler on a pirate ship", if you get my meaning.