Disciples II: Servants of the Dark is a stand-alone expansion for Strategy First’s award-winning PC series. What that should mean is that you just pop it in and go - which is what you can do. But the game also teases to campaigns that are part of the previous Disciples II titles, and while they beckon, unless you have the previous games, you will be doing little more than getting a tasty bit of what Disciples II: Guardians of the Light and Disciples II: Dark Prophecy contain.