To download Battlefield, the process depends on the platform and the version of Battlefield you want. For example, for Battlefield 6 Open Beta on PC, you can download it through platforms like the EA app, Steam, or Epic Games Store. You would:

1. Download and install the respective platform client (EA app, Steam, or Epic Games launcher).
2. Sign in or create an account on the platform.
3. Search for "Battlefield 6 Open Beta" in the platform's store or search bar.
4. Click on the download or add to library option.
5. Make sure you have enough storage space (about 38-39 GB).
6. Launch the game from the platform once the download is complete.

For console users like PS5, you can add Battlefield 6 to your library via the PlayStation Store after logging into your PlayStation Network account, then download it from your library. If you are looking for older versions like Battlefield 2, you can download full copies from sites offering the game or patches and follow community guides to play online. Would you like detailed steps for a specific Battlefield version or platform?