How many JAK games are there

First game:Jak and Daxter: The Precursor Legacy
Second game:Jak II
Third game:Daxter is a game only for PSP and It's timeline is at the beginning of Jak II
Fourth game:Jak 3
Fifth game:Jak X: Combat Racing again, is a racing game but has no importance in the series
Sixth game:Jak and Daxter: The Lost Frontier