In 2010, a group of fans led by Frederik Schreiber (now of 3D Realms/Slipgate Ironworks) started a project called Duke Nukem Next-Gen . It was a ground-up remake of the original 1996 Duke Nukem 3D using .
The "x0r_jmp" tag in your filename is likely the handle of the group or individual who packaged the leak. This build contains a semi-playable version of the "Hollywood Holocaust" level and various test environments.
For over a decade, Reloaded was considered "vaporware" until , when several early builds of the game—including revision 1514 (r1514) —leaked online.