This is Miroslav Zagorac's Boulderdash 1.0-b6 from 1998, long held in archives. These sources were forced off the net decade(s) ago due to overzealous copyright enforcement.

From the original LSM file: Description: Boulder Dash is the clone of the old game from eight bit microcomputers (such as ZX Spectrum, Commodore 64, Atari 800). The game was written for Linux and uses either svgalib or X11R5/R6, but it can be compiled on a real Unix (Solaris, OSF, etc.) as well. The graphics are identical with the one on Spectrum or C64. A level editor is also provided. This version has 300 levels from the original game and there can be more than 2000 levels.

I claim no copyrights. My interest is preservation. To that end, I present a git repo, which starts at the original 1.0-b6 sources, and respectfully brings it forward. My releases will be named "boulderdash-$VER.mit". When I release a new seed, please stop seeding the old and start seeding the new. I will not rewrite git history, so nothing will be lost by moving your seed forward