I guess I'll have to go with Uncharted series.
Dragon age origins, LBP and Valkyria chronicles all beat Uncharted 1 in my opinion, but they all have sequels that were in some way disappointing. Uncharted is the only one that improved. DA2 terrible compared to the first one, LBP 2 campaign was shorter and not as fun, Valkyria Chronicles 2 not available on PS3 :(
Assasin's creed deserves an honorable mention, too bad for the boring first one and AC brotherhood feeling more like an expansion pack.







