Robot Entertainment have recently announced that Orc Must Die! 3 is coming to Google Stadia as a timed exclusive. The CEO of Robot Entertainment Patrick Hudson did say that while it was a timed exclusive for Stadia in 2020, it will also be coming to other platforms in the future.
The hugely popular action-tower defense game was announced at Gamescom 2019 during the Google Stadia conference. The developers Robot Entertainment are promising that the game will be bigger and better in every way possible. I guess we will have to wait and see!