"Earth is the Battleground for Heaven and Hell"
The GURPS adaptation of the In Nomine RPG.
Players take the part of either Angels, Demons, or human "soldiers" that support one side or the other. Players do the bidding of their celestial masters. Success brings recognition and more power, failure brings punishment ... or oblivion.
"Good and evil. Life and Death. Rock and roll. Welcome to the world of In Nomine"