Uninstalling games frees up storage space on your console.
Press the Xbox button to open the guide.
Go to My games & apps > See all > Games.
Highlight FBC: Firebreak.
Press the Menu button and select Uninstall.
Confirm the uninstallation.
Note: Saved game data is stored in the cloud if you're connected to Xbox Live, so you can reinstall the game later without losing progress.