I had games in tapes which were very short. 7 minutes a side comes to mind, but I can't be sure. They were long enough for just one game. The micro could do 12

I had games in tapes which were very short. 7 minutes a side comes to mind, but I can't be sure. They were long enough for just one game. The micro could do 1200 bauds/s, so 150 bytes/s. In 7 minutes you'd load almost 64KB (no game was ever that big).