It's time to head into hell with this next achievement tutorial. The game is Dante's Inferno and you'll be going after the precious and hard to find Beatrice stones. With all three collected, you'll be able to automatically absolve any bad guys you face.
When you also find all three you'll be awarded with two achievements; the Precious and Power of the Cross achievements. Precious is unlocked after you've found one stone and Power of the Cross is unlocked when you've collected all three stones. They're fairly easy to find and will add a sweet 30 gamerscore to your profile. So good luck and enjoy!