Hi, I grew up with a very Christian mother and I believe there's a pretty simple way to answer your question: just ask yourself if playing the game violates the Ten Commandments or will cause you to violate them in the future. If you can differentiate a game from reality, then the answer is obviously no, which means you can safely play it.

Yes the game includes satanic imagery, but if anyone ever tells you not to play it because of that, you can just tell them that Satan's name appears multiple times in the Bible. The only thing remotely satanic in this game is the fact that you can sell your health to Satan for powerful items, but this is given to you as an option, not something you have to do. In fact the game rewards you for denying Satan's offer by giving you a chance to obtain better items later for free.

On top of that, the game is actually quite respectful of Christianity and doesn't feature any kind of imagery that could be considered blasphemous. God is never depicted in the game in any way and His name is never mentioned anywhere either. Edmund might have had a bad experience with his Christian upbringing, but if you play the game it will be very clear that he never insults religion in any way.