The widespread popularity of the game, especially "Super Star Trek", along with the availability of the source code, led to numerous ports of both versions of the game for mainframe and microcomputers. Alternate versions of the game were also produced, based on "Star Trek", "Super Star Trek", or both. David Matuszek and Paul Reynolds wrote an expanded Fortran version of the original game as "UT Super Star Trek"; Eric Allman ported this version to the C programming language to become "BSD Trek", which is still included in the Debian classic Unix games package. "BYTE" published a BASIC version by David Price in March 1977 that used the original command system based on numbers. In 1983 "BYTE" columnist Jerry Pournelle claimed to have written "the world's most complex "Star Trek" game" in CBASIC. A shareware version for MS-DOS, "EGATrek", was released in the late 1980s that replaced the original text-based screens with basic graphics that implemented a multi-paned display.