Disclaimer: This is for games newly released between 22.05.2015 and 28.06.2015. I'm only including games that have more than 10k owners, there's a lot of great games that sold less than that, but I don't think Steamspy results for such low values are statistically sound. I did remove the games that left Early Access this month, as they had a lot more time to accrue owners (Tabletop Simulator, Audiosurf 2, Massive Chalice)
Also, standard Steamspy disclaimer applies - those are ownership data, not revenue and definitely not profit. Many of these games have been discounted during the Steam Sale, a few have been bundled already/before release.
With that in mind, here's the top 10. Full results are available
here
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#1: ARK: Survival Evolved ($24.89) - 73% positive out of 18004 reviews: 929,386 ± 21,833
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#2: DiggerOnline ($9.99) - 48% positive out of 15707 reviews: 474,077 ± 15,608
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#3: Batman: Arkham Knight ($59.99) - 39% positive out of 13011 reviews: 336,891 ± 13,161
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#4: LEGO Worlds ($14.99) - 88% positive out of 4278 reviews:225,764 ± 10,776
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#5: Magicka 2 ($14.99) - 64% positive out of 1479 reviews: 108,966 ± 7,488
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#6: BeamNG.drive ($24.99) - 91% positive out of 1174 reviews: 107,751 ± 7,446
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#7: Hyperdimension Neptunia Re;Birth2 Sisters Generation ($29.99) - 94% positive out of 838 reviews: 68,863 ± 5,953
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#8: LEGO Jurassic World ($39.99) - 77% positive out of 689 reviews: 59,412 ± 5,530
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#9: Duck Game ($12.99) - 96% positive out of 985 reviews: 54,686 ± 5,305
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#10: The Game That Shall Not Be Named ($19.99) - 78% positive out of 2525 reviews: 48,474 ± 4,995
Please let me know if you find a chart like this worthwhile.