Hard release dates didn't really become a thing until the latter half of the 90's for the most part. Big releases generally had them, but a lot of things just sort of rolled out slowly over time. If you lived in a big city, you generally got stuff right away when it was available. If you were in middle of no where Wisconsin, you might not see some games for months, if you ever saw them at all. Availability was also an issue as well, stores might only get one shipment of a certain title in, and that was it. You might have to spend weeks following leads if you were looking to track down some games.