If you mean this series of messages than I think he means from the past, just doesn't have the best english.
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Though whether or not that's true is up for debate, since Helius has probably dropped tons of big names from this industry.
Bethesda and google, no detail.
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Mihoyo artist.
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Capcom artist.
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Is all of this true? Possibly to some extent, though I'm willing to bet the google guy on servers was a janitor from the state of things. Helius just has a history of name dropping things to try and generate hype, a lot of it can fall through or never have anything come from it.