Play Super Mario Extreme BETA Demo! Online

Super Mario Extreme BETA Demo is an unreleased prototype for the Super Nintendo Entertainment System, developed by an unknown team and never officially published. It exists as a curiosity from the platform's later years, showing what might have been if Mario had taken a more experimental turn.

You control Mario through a series of fast, obstacle-heavy stages, aiming to reach the goal while avoiding enemies and pitfalls. The game introduces several unusual mechanics, such as a rapid-fire raccoon tail spin and temporary fire-breathing power-ups that let you clear paths aggressively. Levels are compact but densely packed with hazards, demanding quick reflexes and precise jumps. It feels like playing a condensed, high-energy version of classic Mario, where every second is filled with action.