This is the order we will be playing the games!

- Kingdom Hearts χ
- Kingdom Hearts χ Back Cover runs concurrently with events of Kingdom Hearts χ.
- Kingdom Hearts Unchained/Union χ
- Kingdom Hearts Birth by Sleep
- Blank Points begins
- Kingdom Hearts
- Kingdom Hearts 358/2 Days begins during events at the end of Kingdom Hearts.
- Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-'s primary story runs concurrently with the events of Kingdom Hearts.
- Kingdom Hearts: Chain of Memories
- Kingdom Hearts 358/2 Days runs concurrently with events of Kingdom Hearts: Chain of Memories.
- Kingdom Hearts 358/2 Days ends
- Kingdom Hearts II
- Kingdom Hearts coded
- Signs of What's Next
- Destiny
- Blank Points ends
- Kingdom Hearts 3D: Dream Drop Distance
- Another Guardian of Light
- Kingdom Hearts 0.2 Birth by Sleep -a fragmentary passage- (Beginning and Ending scenes)
- Kingdom Hearts III

As provided by the Wikia page (http://kingdomhearts.wikia.com/wiki/Kingdom_Hearts_(series)/Timeline for more info)