Unfortunately, the amount of speech that could be compressed into a 4K or 8K ROM cartridge was limited, and the system did not sell as well as Mattel had hoped; while the initial orders were as high as 300,000 units for the Intellivoice module and its initial game-cartridge offerings, interest in future titles dropped rapidly until the fourth and last Intellivoice title, Tron: Solar Sailer, sold a mere 90,000 units. A fifth game, a children's title called Magic Carousel, was shelved, and in August 1983 the Intellivoice system was quietly phased out.
The four titles available for the Intellivoice system, in order of their release, were:
- Space Spartans
- Bomb Squad
- Tron: Solar Sailer*
The bold games were reviewed by the Nerd, but, no on Intellivoice. The games marked with asterisk (*) were not reviewed.by him.
A fifth title, Intellivision World Series Major League Baseball, developed as part of the Entertainment Computer System series, also supports the Intellivoice if both the ECS and Intellivoice are connected concurrently. Unlike the Intellivoice-specific games, however, World Series Major League Baseball is also playable without the Intellivoice module (but not without the ECS.)
A further homebrew title, Space Cunt, also uses the male Intellivoice sounds (especially on its main title screen). This game is a spin-off clone of Astrosmash, which uses graphics loaned from Utopia and the TRON game series.