Enter the PSN store to find the game. All downloadable games have purchase options, and those that cannot be downloaded are CD-ROMs or not for sale.

The same is true for additional content. You can also enter the game and choose the option to buy additional content in the game. Every game is different.

It is best to buy the card of the corresponding server through a treasure, and there can be some discounts. Credit cards are full price, and some servers only support local users.

Both point cards and credit cards charge points into the account first, and then use the points to buy games.