Video Game Idea

It would be kind of cool to have a video game in which the object was to slay demons and free other people from the influence of the devils. If you were injured, you would have to find a church in order to replenish your resources--holy water, a new crucifix, a blessing from the priest. On your travels, pick up medals and have them blessed in order to increase your strength via the intercession of the saint depicted on the medal, or receive tips on how to advance to the next level.

The soundtrack would preferably feature plenty of scary organ music for the demon-fighting, and elegant, serene, maybe baroque-ish pieces for inside the churches.