These extras gradually became less common, but many games were still sold in the traditional over-sized boxes that used to hold the extra "feelies". The CD-ROM had much larger storage capacity than floppies, helped reduce software piracy, and was less expensive to produce. In response to a reader's challenge to find a DOS game that played better than the Amiga version the magazine cited Wing Commander and Civilization, and added that "The heavy MS-DOS emphasis in CGW merely reflects the realities of the market". A self-reported Computer Gaming World survey in April 1993 similarly found that 91% of readers primarily used IBM PCs and compatibles for gaming, compared to 6% for Amiga, 3% for Macintosh, and 1% for Atari ST, while a Software Publishing Association study found that 74% of personal computers were IBMs or compatible, 10% Macintosh, 7% Apple II, and 8% other. More than a third of games sold in North America were for the PC, twice as many as those for the Apple II and even outselling those for the Commodore 64. These cards allowed IBM PC compatible computers to produce complex sounds using FM synthesis, where they had previously been limited to simple tones and beeps.
In December 1992 Computer Gaming World reported that DOS accounted for 82% of computer-game sales in 1991, compared to Macintosh's 8% and Amiga's 5%. There were also several other companies that produced early first-person shooters, such as Arsys Software's Star Cruiser, which featured fully 3D polygonal graphics in 1988, and Accolade's Day of the Viper in 1989. Computer games, however, did not disappear.
Yamaha began manufacturing FM synth boards for computers in the early-mid-1980s, and by 1985, the NEC and FM-7 computers had built-in FM sound. The first PC sound cards, such as AdLib's Music Synthesizer Card, soon appeared in 1987. Yamaha began manufacturing FM synth boards for computers in the early-mid-1980s, and by 1985, the NEC and FM-7 computers had built-in FM sound. The first PC sound cards, such as AdLib's Music Synthesizer Card, soon appeared in 1987. As with second-generation video game consoles at the time, early home computer game companies capitalized on successful arcade games at the time with ports or clones of popular arcade games. By 1982, the top-selling games for the Atari 400 were ports of Frogger and Centipede, while the top-selling game for the Texas Instruments TI-99/4A was the Space Invaders clone TI Invaders. That same year, Pac-Man was ported to the Atari 800, while Donkey Kong was licensed for the Coleco Adam. In late 1981, Atari attempted to take legal action against unauthorized clones, particularly Pac-Man clones, despite some of these predating Atari's exclusive rights to the home versions of Namco's game. Consumers began purchasing DOS computers for the home in large numbers. Their defining characteristics include a lack of any centralized controlling authority, a greater degree of user control over the video-gaming hardware and software used and a generally greater capacity in input, processing, and output. By 1990 DOS comprised 65% of the computer-game market, with the Amiga at 10%; all other computers, including the Apple Macintosh, were below 10% and declining. With the EGA video card, an inexpensive clone was better for games than the Commodore 64 or Apple II, and the Tandy 1000's enhanced graphics, sound, and built-in joystick ports made it the best platform for IBM PC-compatible games before the VGA era. Their defining characteristics include a lack of any centralized controlling authority, a greater degree of user control over the video-gaming hardware and software used and a generally greater capacity in input, processing, and output. Later games combined textual commands with basic graphics, as seen in the SSI Gold Box games such as Pool of Radiance, or Bard's Tale for example.