There’s no word yet if GTA VI is going to be released. If it’s anything like GTA 5, GTA VI will be released on console first then on PS, namely Steam. Unless, however, Rockstar decides to release in the Rockstar Social Club instead of Steam, which would be a mistake in my opinion. Or, it might get released on both platforms, who knows at this point. Nothing has been said up to now. It’s purely speculation.

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Grand Theft Auto VI Trailer 1
https://youtu.be/QdBZY2fkU-0