Just as a curiosity and because I found it online, here’s the TSR Catalog for 1980, it came out somewhen in the first half of the year taking into account the products that are covered here. You can see the other less successful games like Gamma World and Boot Hill also made and sold by TSR and it’s also cool to see how they kept supporting and selling earlier versions of the game, such as the white box original D&D for the old-school fans (old school in this case was just 6 years earlier, but even so). It’s also easy to see how AD&D was really the main bet for TSR as other games have the manuals and little else available, while AD&D has modules, accessories and so on.