Boulder Dash IX                 kgbcol38.d64 boulderd.ix
Boulder Dash Professional       kgbcol38.d64 boulderd.pro
Boulder Dash (Super)            kgbcol38.d64 boulderd.sup
Boulder Dash VI                 kgbcol38.d64 boulderd.vi
Boulder Dash VII                kgbcol38.d64 boulderd.vii
Boulder Dash XI                 kgbcol38.d64 boulderd.xi