I'm going out on a limb with this, but I'll assume what platforms the respective games are;
Chain of Memories 2 (the lower right picture): DS (Roxas' (and mabey even a little bit of Axel's) story)
Zero (the top): PSP (I think that you'll go through Mickey's story in this one.)
The one with the Bald man and Terra (the lower left): PS3 (The Knights' story.)
I just wanna call the one with the knights "KH: Knights" for now.
Hmm... So the third one is NOT for the PS3, it seems. I don't know how to react to this. I think I should be glad seeing as I'm thinking that some Kingdom Hearts fans (mainly the younger ones, younger as in lower teens. Yes, that includes me somewhat. *is almost 16*) can't really afford a PS3 at the present time. It'll also give hope to (mabey) a Wii sequal.
However, I don't have a mobile phone, either. Oh well. I'll be happy with Chain of Memories 2.