https://www.gamespot.com/articles/red-dead-redemption-2-wont-match-gta-5-sales-of-co/1100-6460213/

Grand Theft Auto V developer Rockstar Games' next project, Red Dead Redemption 2, is expected to be one of the biggest and best-selling games of 2018. It's certainly going to be huge and dense, as we learned in our recent hands-on time. But it's not going to sell as well as Rockstar's last game, GTA V, according to Take-Two CEO Strauss Zelnick.

In an interview with GI.biz this summer, Zelnick said it would be unrealistic to think Red Dead Redemption 2--or any other game--would sell as well as GTA V. That game has shifted an astonishing 95 million units to become one of the most successful entertainment products of any kind in human history. Red Dead Redemption 2 will still do "incredibly well," Zelnick said, even if it doesn't match GTA V's sales mark.