“Games that include an element of luck are approachable and winnable by a wider audience.”
“Random element prevents us from mastering the game, because making the same exact decisions may lead to different outcomes.”
“Random elements that occasionally allow a less experienced player to win (or at least offer an advantage) keep these players interested for longer in two ways. First, there is always the chance of victory. Second, the sting of defeat is lessened when a player can blame her own bad luck.”
Challenges For Game Designers