A prize is like a reward, except it provides the player with a benefit that is external to the game world. Examples include lottery prizes, cash rewards or coupon schemes. Some prizes are also rewards, such as Poker chips.
Prizes are most commonly associated with gambling games, and the prospect of winning them can be addictive. Prizes tend to affect the culture around a game, removing a sense of spirit and creating adversarial relationships between the game maker and players who search for exploits to win.