from 1982 until 1985, hudson was a technical editor for atari 8-bit computer magazine "analog computing". while at "analog", he wrote a number of machine language games printed as type-in programs, including "fill 'er up" (based on "qix"), "livewire!" (based on "tempest"), "retrofire", "planetary defense" (co-written with charles bachand), and "fire bug" (co-written with kyle peacock). all games were accompanied by the assembly language source code.