Editing D&D 3.5: Wyrdpunk (section)

=== The Game World ===
Because I wanted to maintain the Viking feeling without getting too bogged down by too much historical stuff, the game world is composed of countries and cultures that contain idealized magical places to adventure in. For example the Viking lands contain what was actually there in real life along with giants, monsters, and locations from myths.

This also applies to other places so if you travel to Egypt for instance, you'll find a place of high magic, pyramids, and a pharoah who may or not be an actual God. Or perhaps you'll travel to the land of the Jews and meet an epic level cleric with a one time use self-rez.

Time is also sorta fluid for the purposes of our adventure, so even though two cultures may not have been around at the same time in reality, if it's more fun to actually encounter a people who missed each other by a few hundred years then fun trumps historical accuracy. That if anything is how I'll want to run the game: fun matters more than X.