Ahem.
1.5 didn't have too many bugs. There are some really funny cutscene bugs in KH1, but other than that it's mostly physics issues in KH1 I've noticed, such as with sephiroth. Re:Com seems to be fine other than how bad the cutscene graphics are compared to gameplay. I also had some card's fall below the maps sometimes but nothing too major. The movies seem to be fine. Kingdom Hearts 2 has quite a lot of bugs, so I'm going to be posting a link to all the bugs and some bugs I failed to mention, but some you might come across during game play are the timeless river reaction command bug and saving crashing (though I only crashed once during my playthrough). Here's a full list: https://pastebin.com/t9fzcZsk. BBS seems to have been untouched by bugs, but I've only played Terra so far so i cant speak for Aqua and Ven. DDD is very stable at 60 fps, but there are two big crashes: one where the game softlocks if you switch keyblades too fast and the other during an attack animation (I think it was meteor followed by something else?). 0.2 plays great and there aren't any bugs that I've seen but they don't have Combo Master in critical mode and there are no prize orbs. I also noticed before they patched the games some cutscenes almost crashed my ps4. Other than that, the game were pretty okay ports and they fixed some pretty big bugs like Vexen data, Saix data, quick run, and Xemnas 1 crash.