Launch the games and wait for the game data to verify and load. Once you are on the menu screen, look for a logo with a + sign on the bottom left. Click on it, and you will see the menu slid open from the left. There you can write any player IGN in the search bar, and once the search is complete, you can add them to your friendslist once they have accepted your request. There is also an option for recently played which shows the players from the last game you queued up with.