When a video game studio cancels a project, the code tends to stay with the developers or else disappear into the void. Either way, you're unlikely to ever see it. However, the Library of Congress' David Gibson has unearthed a rare gem. While sifting through a stack of games destined for the archives, he found code and media assets for an unreleased PlayStation Portable version of Duke Nukem: Critical Mass. While Sony's many proprietary file formats made it tricky to poke around, homebrew tools were enough to uncover 3D models, music and textures, including those for Duke himself (shown here). And in case you're wondering, this is a first-of-a-kind discovery; to Gibson's knowledge, every other game in the Library has shipped.