A result level structure includes a number of first result levels and a second result level. Each first result level correlates a respective result level identifier and a respective result value. Each first result level is also associated with a respective expected number of results per given number of plays in a game. As with each first result level, the second result level is associated with a respective expected number of results per given number of plays in the game. In contrast to the first result levels, however, the second result level correlates a respective result level identifier and a respective user definable result value field which may hold any suitable result value designated by a game operator. Thus, the second result level represents a user alterable result level.