Wow only one person remotely mentioned my saddest moments.
Def. FFVII-CC, had me crying like no other, but the series that has made me shed the most tears goes to...
Kingdom Hearts. (spoilers)
Seriously.
The ending of the first one was the first game that I ever cried during. I remember wanting to find out so desperately what happened to Riku and Kairi.
Chain of memories, where he forgets all his friends and they're replaced by some bitc-I mean witch. Then the witch turns out to be sensitive and a good guy, and you find out she'll help you, but you won't remember her. Cool ending bro.
KH2- You know what would make this series better? Let's introduce a new character, get the emotion and personality out of him, make the player love him and relate to him, then force him to die for seemingly no reason and leave all his friends behind and discover his life was a lie. Bye Roxas. Da Hell.
Now, let's have his best friend die in front of the person he lost himself to, and watch as his former best friend confesses that the original character made him feel like he had a heart. Bye Axel. Da hell.
Now let's kill the grandmaster of everything, he can sacrifice himself. Bye Real Ansem. Da Hell.
THEN CAME THE BAD ONES
358 Days- Remember that character that we started 2 with? Let's go through his life, and show how none of it meant anything! YEAH! Let's show how he formed friendships, loved ones, and then lost it all, and show his life over a year leading up to when he is put into a bubble and his memory is erased. Let's also introduce a love interest to him that he will have to kill by his own hand, and nobody will remember her because she never existed. Add in some sad dialogue, and it's good.
Birth By Sleep- Guess what we'll do this time?! You guessed it! Add more Characters then KILL THEM ALL. A whole story for no reason other than we can! Let's do it! GO TEAM! oh and I suppose we can add some more plot holes.
Seriously that series was designed to make you cry.
tl;dr: Kingdom Hearts was designed to prove what a baby I am. Every game has made me tear up.