This document provides an overview of the gameplay for Super Mario Bros. X, a fan-made Mario game. It discusses the system requirements, controls, screen layout, playable characters like Mario, Luigi and Link, common items like mushrooms and fire flowers, and major enemies like Birdo, Mouser and Bowser. The manual was created by community member "Blue" and provides details on character abilities, item effects, and boss battle strategies to help players experience and enjoy the fan game.