Kingdom Hearts • Reason: Obtained all keyblades before beating the Ice Titan. Defeating the Ice Titan gives the unique Diamond Dust keyblade.
So, kinda forgot about this and the old dispute was closed and I was told to open a new one. Basically, what happened is my internet connection failed while i was syncing the trophies on PSN, and when it came back, the trophies weren't there. So, i managed to get the trophy for getting all the keyblades, even though the trophy for beating the Ice Titan bugged. I had to beat him again, on another playtrough, alongside Sephiroth and Kurt Zisa, to actually get their trophies. I don't have any screenshots or anything to really back this up, also didn't think it was going to be a problem since I legitimately got the trophies that were lost anyway.
Edit: Oh yeah. This also happened with the trophy for making all the items on the Item Synthesis sistem. Meaning I also had to gather all the rare drops... a second time, in another playtrough. Pretty painful.