The Machine Gun Challenge is a game mode found only in Cave Story+. Quote begins the challenge with the Level 1 Machine Gun, Booster v2.0, and 20 health, and must navigate through three obstacle course-like areas filled with low-level enemies including Bats, Critters, Behemoths, and Beetles. The challenge focuses on player maneuverability rather than combat skills, and the three main sublocations are called "Races".
|Main||Cave Story • Curly Story|
|Challenges||Machine Gun Challenge • Boss Attack • Wind Fortress • Nemesis Challenge|