Valve just launched a new feature for Steam that they're calling Steam Charts. This is not to be confused with the already existing third-party site, Steam Charts.
In a new Steam blog post, Valve details what Steam Charts is all about. In short, it's an updated version of the old "Stats" section on Steam. Now, the new Charts page will give you a better look at what the hottest games are on Steam. You get a look at what the top-selling games are based on total revenues, plus a look at what people are playing right then and there.
Valve says that the revenue calculation for this list includes all sources such as DLC and in-game transactions. This updated accounting for total revenues will be reflected on other parts of the site as well, such as the Top Sellers tab on the Steam homepage, genre pages, and tag pages.
Steam Charts will show real-time updates on top sellers and most played titles. You will also see how many weeks a game was on the charts, weekly change in rank, and more. A weekly top selling chart will show the top 100 best-selling games based on revenue earned starting and ending each week on Monday at 10AM (PT).
Valve has been keeping track of the weekly top selling games since it launched. This means you can go back through previous weeks already to see what was popular in the past. In fact, you can go back to the very beginning to see what the best-selling games were on Steam.
