Ridge Racer

As soon as you start the game, you have to choose a team to sign with. Simply choose Squaris GP and the trophy will unlock. Now, if you have just got the game you will want to sign up for a team, get the trophy and delete your Game Data so you can load up the game and sign up with a different team.

Game Data is deleted by holding down the Ridge Racer bubble and then pressing the '...' icon. As soon as it's gone, load the game back up again and select a different team. Repeat until you have 3/4 of the team trophies (you will transfer to the last one late in the game). If you are already well into the game, then you will want to back up your Vita to either a PS3 or PC. Do this by opening up 'PS Vita Application Data Utility' on the PS3 and then plug the Vita in. You can either do a full system back up or just back up the game (I did a full one to be on the safe side, but I don't see why just backing up Ridge Racer wouldn't do the job).

Once you've backed your data up, delete your Game Data and do the same as above. If you are doing the back up method, leave it until later in the game just in case you encounter any problems. As of 11th July 2012, Squaris GP is the least popular team.