I am old enough to remember the Satanist scare of the eighties, and whether or not you agreed with those attacks (personally, I think they were wildly misplaced and had the opposite effect than their stated goal), they had a marked effect upon how the game is perceived. A perception, by the way, that is pervasive even today.
Starting with 2e, D&D hardwired paganism into its system. Coupled with the poor quality of TSR products thereafter, this was a huge factor in my drifting away from the game. At the time, I didn't know if I would ever be able to play again — despite the new enthusiasm for the game that 3e generated.
Thankfully, the passing of Gary Gygax stirred in me a nostalgic longing that was duplicated in many a gamer, especially of my vintage. Many of us cracked open older editions of D&D to hold onto what the world lost with the passing of Gary. Personally, I found a game not only friendly to a Christian world-view, but one that, in places, can only be described as Christ-centric.
Recently, I ran across this eye-opener while re-reading some of the monster descriptions from the Holmes Basic Edition:
All vampires, regardless of religious background, are affected by the cross which is sovereign against them.Is there any way to see this statement as non-Christian? I, for one, can't see it.
Christ is the King of kings, sovereign Lord through whom all things were created. He is I AM, Yahweh and Elohim — He is the Most High God. He took on our nature, which was nailed to the Cross — the very place where He became the King of Glory, who has authority over both the living and the dead and through which He saved His creation. Since vampires are creatures that grasp at immortality sans Christ, His symbol of His own victory over death is repellant to them.
This, frankly, is one of the strongest Christian statements I have yet found in any of the various editions of D&D. I wish I had been aware of it back in the 80s because I could have used it to put all those anti-D&D propagandists crying "satanist!" to shame.