A wagering game system and its operations are described herein. In some embodiments, the operations can include initiating a secondary game for presentation on a wagering game machine. The secondary game may be associated with a primary wagering game being presented on the wagering game machine. The operations can also include detecting secondary game events associated with the secondary game; generating secondary game history based, at least in part, on the secondary game events; and generating a pointer to a storage location of the secondary game history. The operations can further include providing the pointer for the secondary game history to the wagering game machine to be stored within a primary wagering game history associated with the primary wagering game.