A diceless role-playing game is a role-playing game which is not based on chance: it does not use randomisers to determine the outcome of events in its role-playing game system. The style of game is known as "diceless" because most games use dice as their randomiser; some games such as Castle Falkenstein use other randomisers such as playing cards as substitutes for dice, and are not considered "diceless".
One commentator described the introduction of diceless RPGs in 1991, They went "diceless," creating a rules system where everything was worked out by the Game Master via numerical comparisons and other (non-random) techniques. Amber Diceless (Phage Press) created quite a stir, and the great diceless debate had begun in full force. A debate that, ultimately, the dice fans would apparently win, at least in the marketplace.
Proponents of this solution argue that in all game systems, decisions are ultimately made by the GM, and rolling dice merely slows gameplay. Opponents may perceive diceless systems as more arbitrary and lacking the feeling of real unpredictability; for example, the potential death of a character as a result of bad luck in a dice roll.
Examples of diceless games
Some other games, such as Over the Edge (game) can be played diceless.