https://www.polygon.com/2019/1/28/18201004/valve-metro-exodus-epic-games-store

Earlier today, Deep Silver and Epic Games announced that the PC version of 4A Games’ Metro Exodus will, after today, be sold exclusively on the Epic Games Store and not on Steam. There are important caveats to that exclusivity: Existing pre-orders through Steam, which have been available for months, will be honored; physical copies will include Steam keys; and the deal is exclusive for one year.

Still, Valve calls the decision to pull Metro Exodus sales from Steam in favor of Epic’s digital store “unfair.” In a statement posted to the game’s Steam store page, Valve alerted potential buyers about the exclusivity arrangement and weighed in on what it means for its customers: