A tweet from gscstalker has an update on the status of S.T.A.L.K.E.R.: 2, which doesn't ease the concerns about the future of this first-person shooter sequel that first came into doubt amid concerns developer GSC Game Worlds was shutting down, saying: "despite no official continuation of Stalker 2. it looks like the ideas and spirit will live on in the team's new game – 'Survarium'" (thanks Eurogamer). An official website for Survarium (working title) has details on this, saying: "Survarium is a free2play MMOFPS game set in the near future. The game focuses on a mass- scale ecological catastrophe on Earth, the reasons behind vaguely known." That sure does sound like the S.T.A.L.K.E.R. spirit, and the - Vostok Games About Us Page explains why this would be, while also confirming that GSC Game World is closed and that development of S.T.A.L.K.E.R. 2 is "frozen":

Our company appeared in March 2012 in Kiev. Ten years earlier, when at GSC Game World we started developing the renowned S.T.A.L.K.E.R. game series and continued working on it until December 2011 when the studio was unexpectedly shut down and the S.T.A.L.K.E.R. 2 project – frozen. We did not reach agreement with the rights owner regarding the use of S.T.A.L.K.E.R. brand, that’s why we made the decision to move forward as an independent studio with a new project. That day became our starting point for Vostok Games.

Vostok Games is a new studio founded by veterans of Ukrainian game industry with multi-year experience of developing and releasing commercially successful projects. In March 2012 we reached agreement with Vostok Ventures Ltd. to back up the financing of our new game – free2play MMOFPS Survarium(working title).