https://www.techradar.com/news/rocket-league-on-xbox-game-pass-brings-necessary-muscle-to-its-service

In a major play to bring more popular contemporary multiplayer games to its service, Microsoft has added Rocket League to the Xbox Game Pass subscription. Microsoft teased the addition via Twitter overnight, with the switch made official on the Microsoft Store short after.

Now, players who pay the $9.99 (£7.99, AU$10.95) monthly fee for Xbox Game Pass can play as much Rocket League as they wish, complete with nearly all of the game’s downloadable expansion content since its launch.