Behind every legendary album lies a raw, unpolished version—the demo. These early recordings capture artists in their purest form, often before producers, labels, or commercial pressures shaped their sound. While most demos vanish into obscurity, a select few have surfaced as rare vinyl records pressings, offering a glimpse into musical history and occasionally altering the course of music itself. These are the demo pressings that didn’t just precede greatness—they helped define it.