Following the bold strides of the early pioneers, new private spaceflight ventures emerged with high hopes of establishing a commercially viable launch industry. Yet, despite promising ideas and technical ingenuity, their collective achievements remained just shy of success. Foremost among these endeavors was McDonnell Douglas’s DC-X, a revolutionary single-stage-to-orbit test vehicle designed for rapid turnaround and full reusability. Its breakthroughs in vertical takeoff and landing hinted at a future where rockets could function more like aircraft. Around the same time, Rotary Rocket Company introduced the Roton “space helicopter,” another novel concept for reusable launch. Though its rotor-based landing system was never fully tested, Roton’s ambition sparked valuable discussions about cutting-edge rocket design. The chapter concludes with Kistler Aerospace’s K-1, a fully reusable, two-stage rocket that garnered significant attention but struggled under the weight of funding obstacles and changing market conditions. Together, these projects underscore the tremendous challenges inherent in developing a profitable private launch industry. They also highlight how incremental advances—despite failing to reach orbit—contributed to the deepening pool of knowledge and experience that would later propel commercial spaceflight to greater heights.