Examples of racing series that don't sell as much as they used to?

[Dark_Feanor]

1	Forza Motorsport 2 (X360) Microsoft	2.52	0.04	1.45	4.01
2	Forza Motorsport 3 (X360) Microsoft	1.36	0.06	1.44	2.86

 

I belive the some will happen with GT5-Prologe/GT5. Forza was the first racing game riting the 360, without any big francise to concur.

PS: We can expect something similar to Halo3/Reach.