Gangster Bros is a single-player action, shooter, and platformer game in which players control characters like Mario, Luigi, or Mr. T as they navigate through challenging levels filled with fire, traps, and enemies, utilizing firearms to combat obstacles and foes. In this game, Mario is on a mission to rescue Ms. Princess Peach, battling through various levels that combine classic platforming with shooting mechanics, set in a stylized, urban environment. It stands out with its unique blend of traditional platforming gameplay with modern shooting elements, featuring pixel art graphics, fast-paced action, and a humorous, gangster-themed twist on the classic Mario universe.