MAINLINE

More about MAINLINE

A high-velocity roguelike FPS where players embody caffeine injected into a human's bloodstream. Survival timer resets only by killing enemies; failure results in metabolism. Core gameplay involves rapid movement through blood vessels, with each kill increasing speed and reducing time to next enemy. Vision darkens as metabolism progresses, and the game features no time bar. Four play modes: Normal Stages, EX1, EX2, and Endless. Six chapters progress from peripheral veins to brain, with each chapter ending in a mutant guardian. Upgrades stack across runs but reset per chapter. The game emphasizes speed, precision, and high-stakes combat in a microscopic human body environment.