For example, when a fighter attacks, he would roll a 20-sided die (called a d20 in-game) to determine if he hits the target and then roll another die determined by the type of weapon (an 8-sided die (d8) for longsword, two 6-sided dice (2d6) for greatsword, 10-sided die (d10) for dwarven waraxe ... ( +view full text )
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For example, when a fighter attacks, he would roll a 20-sided die (called a d20 in-game) to determine if he hits the target and then roll another die determined by the type of weapon (an 8-sided die (d8) for longsword, two 6-sided dice (2d6) for greatsword, 10-sided die (d10) for dwarven waraxe etc.) to determine damage dealt. Although nearly all actions are based on a dice roll, the player does not see the dice roll and it is calculated "Behind the scenes".