The announcement was integrated into the studio review and there it included a link that leads to what will be, at some point, the official site of Stalker 2. Do we need a sequel to S.T.A.L.K.E.R.: Shadow of Chernobyl though? The post says nothing more about the upcoming sequel or game, but you can read it over right here if you want to. However, GSC shut down a year later and thus the project was cancelled, though the company was later resurrected in 2014.
Speaking of uncertainty, a lot of people believe that the number or date 2021 on the teaser website is some special hint, while other people believe that it's the date when S.T.A.L.K.E.R. 2 will release.
For those not familiar with the title, S.T.A.L.K.E.R is a spooky first-person shooter that is known for its dark themes and challenging gameplay.
But to help quell concerns, the owner of S.T.A.L.K.E.R. developers GSC Gameworld, Sergiy Grygorovych, confirmed via Facebook that S.T.A.L.K.E.R. 2 was real.