From Wikipedia
Creative Computing was one of the earliest magazines covering the microcomputer revolution. Published from October 1974 until October 1985, the magazine covered the whole spectrum of hobbyist/home/personal computing in [an] accessible format. Creative Computing also published software on cassette tape and floppy disk for the popular computer systems of the time.
User summary
Creative Computing published numerous games as type-in source code. These typically were listings in BASIC or machine code, though a variety of languages appeared over the years. Early type-in listings usually were intended to be "vanilla" BASIC that could easily be adapted to any system's BASIC. Later listings usually were specific to a particular system's BASIC (often, these listings were published for multiple target systems).
Many of the more popular type-in programs were offered on cassette tape (at additional cost), saving readers the difficult (often torturous) process of typing in pages of source code. As the published games often were fairly simply, the cassette tapes usually were compilations of several games for a single system. Too, Creative Computing sold a large variety of cassette tapes containing games or other utilities, with content that did not appear directly in the magazine; usually these included multiple games for a single system.