Here are some secret Trophies in Gran Turismo 5.

Endurance: Complete the Endurance series of Race event

Red Bull X1 Challenge: Complete Red Bull X1 Challenge special event

Watch Falling Objects: Intentionally make a part of your car fall off while driving. This is done alot easier with the rally cars where the doors come of alot easier.

Rollover: Rollover a car by flipping a car totally. Done by driving on trial mountain and hitting the S curve before the starts finish line in a fast car

Honda: Take a picture of Honda at Honda head office in Tokyo on R246 track. Take a photo of any honda car driving past the building on your left hand side at the end of the pit exit.

Picture Exclusive: Take a picture of someone special as he stands in Kyoto's Gion district. There is a guy standing on the left on the bridge zoom onto his face and use Auto Focus,when he turns and looks at you take a pic and you will recieve this trophy.

Portraitist: Take a picture of a solitary lady. This is on the second photo location. There is a lady sitting on a bench with a cellphone zoom onto her face use auto focus and when you have a clear shot take the picture and you recive this trophy.

Grand Finale: Reach the long version of the ending movie