Ace combat 1, 2 and 3 are on ps1.
Ace combat 4, 5 and zero are on ps2.
Ace combat X and joint assault are on Sony PSP.
Ace combat Xi is on apple iSO.
Ace combat 6 is on Xbox 360.
Ace combat assault horizon will be released soon on Xbox 360 and ps3.
There is also an ace combat game planned for Nintendo 3DS.