Here's a guide on how you can update your games on Epic Game Store:

1. Open the Epic Games Launcher on your computer.
2. Navigate to your Library, where all your installed games are displayed.
3. Look for the game that needs to be updated in the list.
4. If an update is available, the game tile will have an update button.
5. Click on the update button next to the game.
6. The Epic Games Launcher will begin downloading and installing the update automatically.
7. Once the update is complete, you can launch the game and play the updated version.

Epic Games has automatic updates enabled by default, so in most cases, games will update automatically when a new version is available. However, you can also manually trigger updates as described above if needed.

Note: The exact steps and interface may vary slightly depending on the version of Epic Games Launcher.