7, the game adopts a rail shooting format viewed from a first-person perspective, which can be played with a standard controller or with an NES Zapper, depending on the mode chosen by the player before the start of the game. In these stages, the player must shoot as many gunmen as possible and then destroy the boss at the end of the stage without running out of health or ammunition. Certain enemies will drop additional ammo and health kits, as well as other power-ups such as an hourglass that gives Billy unlimited ammo for a limited period, a bulletproof vest that leaves him invulnerable for a while as well, and a star that destroys all present enemies. In Stages 4 and 5, the player must drive Billy's jeep through the freeway from the grasslands to the suburbs before time runs out. In these two stages, the player steers and accelerates the jeep with the d-pad, while the A and B buttons are used to launch grenades at airborne enemy vehicles and shoot at other cars in front of Billy's jeep. These are the only stages where the player does not have a health gauge and as a result, a single collision with an enemy vehicle, bomb explosion or any other road hazard will result in a lost life. The player can pick up gasoline cans along the way to extend the time limit. In addition to the main game mode, there's also a practice mode featuring shorter versions of select stages in order to help players familiarize themselves with the controls for each gameplay style. Completing a practice stage will award the player with a power-up that can be used in the main game. Regional differences The game was originally released for the Famicom in Japan under the title of Mad City and was retitled The Adventures of Bayou Billy when it was converted to the NES for the international market, undergoing many extensive changes during the localization process. The NES version is harder than the Famicom version; enemies in the beat-'em-up stages are more aggressive and have more health, the player starts the shooting stages with less ammunition, and the driving stages have narrower roads. The driving stages in the Famicom version also give Billy's jeep a health gauge, allowing it to withstand collision from enemy vehicles and road hazards, a benefit not available in the NES version. The