How so? I know that one of the main twists of FFVI is Kefka destroying the world after usurping the supposed villain, but what else does it do?
Being a newbie to the franchise, I'm curious.
Each of the main characters have their own twists and turns. Locke's real reason for fighting, Celes' self-loathing, Terra's origin, power and finding her confidence, Edgar and Sabin's relationship, Cyan ;_;7 and the very neat subtle clues the developers scattered around between Shadow, Strago and Relm. I'm trying to keep it vague. Definitely play the game. There is a ton going on even in terms of animations and the way scenes are set up despite it being a SNES game. And I didn't get through all the characters. Even the lesser playable characters have their own neat little stories.
Since you know the big twist we can talk about that. It is both a subversion in terms of general scenario and in terms of game design. On the one hand you see the heroes confront the big bad and lose. He scatters the party, destroys the world and becomes a god that rules with fear and absolute power. And on the other hand you have a game design that cleverly weaves a very detailed tutorial and story together. The entire first third-to-half of the game teaches the player every system in a well-paced and entertaining fashion. Then the bad guy wins and the game changes; the tutorial is over and you have to start from scratch.
Thematically the game is very different after this as well. You are fighting to save a broken, doomed world. Even after you win the world isn't magically repaired. Death and destruction still remain everywhere. Your victory amounts to resolving a personal vendetta and to say that you "saved the world" rings hollow considering it is in ruins. There is a lot to Final Fantasy 6. And it does get its due which is good.
Final Fantasy 7 is a great game as well and I think the time of its release and its use of newer technology play a huge role in its popularity. Which is why I like to exercise pause when praising it because FF7 does stand on the shoulders of the game that came before it and I think moreso than other entries in the series. Before 7 came out, 6 was talked about in much the same way in places where games were discussed. And while Final Fantasy always had a following, FF6 really had that sort of broad appeal that the earlier games never achieved. 6 and 7 are the peak of the series, each occupying the ultimate rise and gradual decline of Final Fantasy. They are very interesting games and I really think you can't talk about one without discussing the other.
And you look at 6 and compare it to 7 and see a full realization of the storytelling techniques that were a struggle to achieve on the Super Nintendo. The added detail that the PS1 was able to bring out with prerendered backgrounds and improved combat scenes breathed a whole new life into the genre. At their core though both games exhibit compelling characters and interesting (though sometimes bad) writing. 6 perfected Square's storytelling style and 7 joined that style with the technology that the developers had always wanted. After this unique period in the franchise's history the shackles of limited technology were largely removed and unfortunately the series never recovered from that lack of restraint.