Serious Sam 4 is coming to PC and Stadia in August 2020. Yes, you read that right… Stadia. While previous previews of the game indicated it would also appear on PlayStation 4 and Xbox One, Google’s cloud gaming service will get Serious Sam 4 long before any traditional consoles.
Source: Kotaku – Stadia Exclusivity Will Keep Serious Sam 4 Off PS4 And Xbox Until 2021