UPDATE 21/5/20: Serious Sam 4’s PlayStation and Xbox versions will be held back until 2021 due to its timed-exclusivity on Stadia, publisher Devolver Digital has said.
The previously-announced PS4 and Xbox One editions were not mentioned alongside those for PC and Stadia when its August release was detailed, below. Now, a Devolver rep has revealed to Kotaku these will not see release until next year due to an exclusivity deal with Google’s streaming console.
“The game is still coming to Xbox One and PlayStation 4 after its period of exclusivity is over with Stadia,” Devolver said.
Source: Eurogamer New Serious Sam 4 gameplay shows "thousands" of enemies on the battlefield