Ukranian developer GSC Game World has made a statement about Stalker 2 with a targeted launch date of 2021. There are three games in the series so far — Stalker: Shadow of Chernobyl, Stalker: Clear Sky, and Stalker: Call of Pripyat. Stalker 2 was declared back in 2010, with an expected release date of 2012. Stalker 2 struck a series of issues and it was presumed abandoned until now. GSC Game World has put up a website that does not have much over a background and contact details.
You can take a look at the Stalker two website and see for yourself how little there is to learn about the game as of this moment. There’s a tweet on the official Stalker 2 accounts that cites a launch date of 2021. It is uncertain whether Stalker 2 development has begun. The Stalker two site lists three email IDs for information, jobs, and media inquiries about the game. There is not any word on which platforms Stalker two will launch on, although the first 3 matches were just on PC so that we can perhaps assume that a PC release is about the cards.
The Stalker series is set in an alternative reality where there has been a second nuclear disaster in Chernobyl. The game featured mutant animals, plants, and even humanoids from the Stalker series, which has been commended for producing the Zone — the site affected by radioactivity which harbours all these mutants.