Roll a D20

2d 20A dital PDF of Fallout: The Roleplaying Game - 2d20 Rules Booklet, a book which helps Overseers use the 2d20 ruleset from ModiphiusWith Roll A Dice & Dice Roller, you can roll 4, 6, 10, or 20 dice. Have a specific number of dice to roll? A user-friendly interface will allow you to change the total number of rolls with just one click.