Some people consider Grand Theft Auto to be the best game available on console today. Amazingly enough Xbox and Rockstar struck a deal to give it away for free to Game Pass subscribers.
If you have an Xbox all you need to do is go to the game pass tab, find the recently added section and click on the GTA V icon. Then simply click install and you will be playing in a few hours.
The price for the first month or two is likely about $1, then ongoing you pay either $9.99/mo or $14.99/mo depending on which option you choose. It really is one of the best values around. They constantly are now launching AAA quality games for free into game pass.
Hint, the GTA game updates and DLC is now currently revolving around the Casino. Find it and have some fun!