Correct, this graph only encompasses US releases. I didn't want to double- or triple-count international releases of the same title, so I took this NA-centric approach for now. I may go back and try to do separate charts for the three major territories at some point. There might be some mis-timing of early releases, I plan to go back through the VGChartz history to see which week titles first appeared in the sales data and clean some of that up.
I'm also intentionally NOT taking announced/upcoming titles into account in any way. What actually counts, IMO, is titles brought to the store shelves; if a platform is failing or market tastes shift, or a completed title isn't up to critical snuff, sometimes the investment for retail distribution proves not to be worth it. (There were over a hundred titles announced for the Atari Jaguar that never made it to market.)
I do plan to update and improve this, just wanted to take a first crack at it while I had some free time over the weekend.







