When not on a mission, the player is given free roam over a small area of San Francisco, which includes a park, several stores and the homes of Johnny's friends Mark and Denny.

There are several side quests that the player can engage in when not on missions, such as reading Denny's daily diary entries or finding ten hidden spoons, which unlocks an extended ending to the game.

For the most part, the game follows the plot of the movie: amiable banker Johnny helps his friends with their day-to-day problems while preparing for his wedding to his future wife, Lisa.

The player controls Johnny as he engages in activities that were only referred to in the film, such as his taking on a mystery client at his bank and his turning over drug dealer Chris-R to the police.

The final level of the game permits players to "tie up" loose plot threads left hanging at the end of the film, such as the fate of Chris-R and Johnny's contentious relationship with his superiors at the bank.