Some truly impressive data-hacking by the technology site Ars Technica is offering new estimates about what people are playing on the super-popular PC gaming platform Steam.

Based on months-long daily scrape of publicly viewable user Steam user IDs, gaming editor Kyle Orland has developed what he calls the "Steam Gauge," and it is a much richer picture of what goes on inside Steam than owner-operator Valve Interactive has ever offered.

Here are some of the key takeaways, but it's worth reading the whole thing if you play on Steam, or just like data journalism.

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Seriously, read the whole thing. It's great.

Note that Mr. Orland's methodology has come under fire for randomly sampling a very small percentage of the total user base. A second article lays out methods in even more detail, and I was persuaded that this is at the very least a good reference point for how to think about Steam. Also, here's the Steam Gauge top 100 most-played games.