Dungeons and Dragons isn’t exactly popular amongst some Christians. The whole pagan gods and sorcery thing adds up to a double whamy of let’s-not-go-there. Others, as seen in this PVP strip, take a different approach to Christian gaming.
For the record: I’ve played D&D. I can see how it may be a stumbling block for some. I view it as a matter of freedom and choose to see it as engaging with fiction. But that’s a wisdom decision for the individual.