Google said on more than one occasion that developers want to see Google's commitment before they commit to Stadia, and there doesn't seem to be a more confidence-instilling developer than Rockstar Games, who are onboard with Stadia.
Of course, this just leaves the little question of - onboard with what. Other than a few mentions and the flashing logo, neither Rockstar nor Google provided more info.
Google Stadia's press releases mention the likes of Electronic Arts, Rockstar and Capcom, which alone is enough for a scary initial lineup of games. However, all three will announce content "at their discretion", meaning more waiting.
Now, if we were talking about Take-Two, Rockstar's trusted publisher, listing potential candidates and certain shoe-ins would take ages, what with the star catalogue Take-Two's CEO Strauss Zelnick oh-so-proudly boasted, quite rightfully so.
If were to judge by GTA V's performance, the Stadia port wouldn't only be likely - it would be a must. Sure, porting a six-year-old game sounds like a long shot, but this is not a game - this is GTA.
With Red Dead Redemption 2, on the other hand, Rockstar have a unique chance to let the entire world try it out, console or no console, which would be a symbolic victory for Google too - a cheeky reminder that Stadia is the one console-less console to end them all.
Take-Two's recent reports said that Red Dead Online, RDR2's multiplayer mode, hasn't been doing great but they are optimistic things will change soon.
Note that when he spoke of changes, Zelnick was referring to RDR2's update schedule, and he stressed that its arrival on PC depends entirely on Rockstar.
Ultimately, Rockstar's inclusion in Google Stadia-approved list of developers is most certainly a reason for optimism, as their track-record for delivering masterpieces is simply unmatched.