In Nomine

"In Nomine is a role-playing game designed by Derek Pearcy and published in 1997 by Steve Jackson Games,based on the French game In Nomine Satanis/Magna Veritas. Players typically assume the role of angels and demons in a setting that draws heavily on the traditional Christian mythos. In Nomine won the Origins Award for Best Graphic Presentation of a Roleplaying Game, Adventure, or Supplement of 1997."

Source: Wikipedia, "In_Nomine_(role-playing_game)", available under the CC-BY-SA License.

Microbadge for In Nomine:

In Nomine is based on the french game In Nomine Satanis / Magna Veritas

User Note: This system uses three six sided dice, one of which is different and known as the "Check Digit." Two dice are added together and compared against a target number, where equal to or lower than that target number is a success. The Check Digit is used to determine the degree of success from 1-6. Rolling 111 and 666 have special meaning (known as 'divine intervention'). In the case of 111, it means God has intervened (1+1+1=3, the Trinity). In the case of 666, Lucifer has intervened (666 = Number of the Beast). This may be a critical success or critical fumble, depending on what side of the Celestial conflict one is on.