Quote: TashijiThe only trophy to watch out for is "Gotta Buy 'Em All," and that one glitches unless the same player (Player 1) purchases every upgrade for said character the first time through.
That can't be the only cause of the glitch, as my version of the game has only been played as a single player game, and it still glitched.
The only thing I can think of that was out of the ordinary on my session is that I actually had all the purchases done for Hex (except for the soul gem). I had the money to afford the final purchase but didn't actually have the gem (hadn't reached far enough in the story to get it). Maybe the act of trying to do the final purchase with the proper money but without the proper item confused the trophy check somehow. <Shrug> Dunno.
I'd suggest trying to max out someone who you already have the Soul Gem for, and not leaving the Soul Gem purchase as your final one, just in case.