1. Kingdom Hearts 1 2. KH1Final Mix 3. KHChain of Memories 4. KHRe:CoM 5. KH2 6. KH2FM 7. KH2FM+ 8. ^Remake of CoM included. 9. KH358/2 Days 10. KHBirth سے طرف کی Sleep 11. KHBBSFM 12. KHBBSFMV2? 13. KHCoded 14. KHRe:Coded 15. KHMobile(Not really counted سے طرف کی most fans) 16. KHDream Drop Distance
That should be all of them so far, not including how many languages it's been translated to. ^_^
I think there are at least 5 KH games that I know of: Kingdom Hearts, Chain of Memories, 358/2 Days, Kingdom Hearts 2, Birth سے طرف کی Sleep. Those are the only ones that I know of. If there's more, I don't know of the newer ones. Sorry, but I only know those 5.