A thrilling adventure in which you must purchase all the things you need, including your computer of choice, to play an adventure.
Notes
This was published for the VIC20 in 1982, for the C64 in 1983 and for the Coleco Adam in 1984.
Also listed as being published later by the UK's Rabbit Software, although it's not known if that release was authorised; Mogul Communications were the usual UK licensee.
Can be download for a stock Vic20: https://www.mdawson.net/vic20chrome/vic20/gamebase/vic20/games/Computer%20Adventure.zip