True Crime: Streets of LA is a free-roaming driving and action game similar in concept to Grand Theft Auto III. The game's structure is mission-based, most of the missions are dictated by the story and initiate following a cutscene that advances it. Failing a mission still allows the player to continue playing through the chapter and undertake subsequent missions, in some cases this will lead to branching paths and optional missions. However, in order to complete the whole chapter the player must eventually succeed in all the main missions.