From Introduction: Weird War One was written for Savage Worlds Deluxe, but it’s easy to update for the Savage Worlds Adventure Edition. Most of the rules can be used as-is. Those that require a little more work are detailed below. Where core rules differ, the Game Master can use whichever version she prefers. Both versions will work just fine in your game, though those presented in SWADE are a bit more structured and streamlined.