No, the KH3 reveal doesn’t count

Kingdom Hearts: 358/2 Days was the only Kingdom Hearts game that made me cried, because of Xion's "death" and Roxas feeling sorrow of losing one of his best friends. The rest of the games didn't made cried.

The endings of 358/2 Days and 0.2

 

DDD made me cry because I didn't understand the whole time travel stuff lol

Technically all of the games except for Re:Coded since it didn't have nothing to cry for, it only reminded us of the tragedies of the past and how there's still hope...

I cried in kh1, but 358 really got me.  That one gets my vote.

None of them to be honest

Xion's death in 358/2 Days, and the Blank Points cutscene from BBS got me a little teary. The ending of 0.2 was the same, but I didn't feel as emotional over it as I did the other two. 

 

Also Unchained Chi makes me cry every time SE tempts me to squander my precious jewels away.   

Honestly, Birth by Sleep blank points always brings me to tears. The music and the atmosphere of hope always gets me.

Cry is a big  word. But 358/2 days hit me right in the feelings...

Days and BBS made me cry during the first playthrough, but not anymore. The KH1 ending still gets me tho.

Not to sound insensitive, but what in the world is there to cry about in Recoded?

KH2 when Goofy “died”. Was I believe the only time I actually cried during playing a video game.

Well, I don't think I've actually cried, but I have gotten misty eyed, and my skin has been riddled with goosebumps when I've played through the Kingdom Hearts games, but the one that probably got me the most feelsy is Birth By Sleep, because of how tragic the game's ending is! Basically, the Wayfinder trio gets screwed over and they vanish from the world, with fates worse than death! That's something to get all riled up about!

 

Days is also a heavy contender, for obvious reasons!

Every game except Coded.  

Kingdom hearts 1 and 2 Both endings are just Perfect But now I dont Cry Anymore never! Because I am a manly man! "the future dosent scare me at all!" stupid Onions!

358/2 full stop. The music captures the emotional definition of 'melancholy' beautifully, and delivers it with such grace and power that it gets overwhelming at times. Before completing the game, that game's version of dearly beloved is beautiful and chilling in a mysterious, sad way, but after completing the game it takes on a whole new feeling as that lonely flute takes on a more heart wrenching tone. 

 

Xion's theme deserves special mention, because her theme is literally titled "musique pour la tristesse de Xion" which translates literally as "Music for the sadness of Xion." 

Days and BBS made me cry during the first playthrough, but not anymore. The KH1 ending still gets me tho.

 

Not to sound insensitive, but what in the world is there to cry about in Recoded?

I can't remember if it made me cry or not but the final scene with Data Roxas was pretty emotional. He may not be the real Roxas but he appeared to feel the same pains, sadness and inner conflicts as the real thing. And Jesse McCartney's voice acting portrayed it all perfectly.