You can take part in races on all the authentic tracks, unlock more difficulties on each track and gain more Credits to purchase more cars. You will not discover any Championships or FR/MR/4WD specific races here. The just missing thing can be a story setting.
It is certainly a mixture of Gran Turismó 4 with some elements of 5 and 6. The Graphics are superb, the audio as well. More than 800 Cars, 30+ monitors and a lot to do.
The first Handheld port of Gran Turismo is definitely a Gemstone for any race fans.