The Omni was, in effect, an audio game console using 8-Track tape cartridges to supply the pre-recorded questions and answers along with some data (not audible to the user) to control the scoring indicators. There was no video output.
It was introduced by MB Electronics in 1980, a division of the Milton Bradley company that had introduced the Microvision handheld video game console the previous year.
Up to four players could play the Omni system at any one time, and each player had a row of 11 buttons displaying numbers, colours and clusters of letters to type in the answers.
Most of the released cartridges contained quiz-type games, and there were four programmes to choose on each tape (in the same way as audio 8-Track cartridge). Cartridges came with a dust cover to protect the tape when not in use, and users were advised not to touch the exposed tape, as the data contained on the tape would be more sensitive to dust and fingerprints than a standard 8-Track.
Fewer than 15 cartridge titles were created for the console, and perhaps partly due to its high price, it doesn’t appear to have been very successful.