Optionally, you can also delete its saved data (which contains all your progress in the game) to free up a bit more space. But don't worry, you can always reinstall your games for free later.
Navigate to the game you want to delete on the PS4 home screen. Highlight the game icon, but do not press X to launch it.
Games tend to take a lot of space on your PlayStation 4's hard drive. If your PS4 is getting close to capacity, you may need to remove older games you are no longer interested in playing to make ...