I had a game company in '82 for Commodore VIC-20 and C-64 home computers. We sold our games on cassette tape, had to contract printers for the cassette labels and the package sleeves, and then myself and my partner heat sealed each one by hand. One of our games had a memory issue, as the memory was re-organized between two manufacturing runs of the VIC-20, so we printed the series of PEEKS and POOKS necessary to get the game to run after loading in our magazine ads - and it did not appear to impact sales. Made some money, but being "dumb kids" (17 years old) we went bankrupt. That experience gave me focus during my undergrad.