Portal 2
gameappid 620 · released Apr 18, 2011
The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
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Daily aggregates from the nightly rollup — raw samples are never scanned to draw this. Daily history is served for at most ten years, so this starts Sep 17, 2016 rather than at release.
No daily history in this range yet: daily points are added by the nightly rollup. Recent samples are under Last 7 days.