[Psiko]

What if Celes never left the Empire?

Oh. My. God.

To begin, Locke most likely would have never made it to Narshe. TunnelArmor would rape him like a little schoolboy. Without her Runic ability, he is doomed. There is one hero down.

Second is the loss of two defenders for the Esper, which would almost solidify the chance of Kekfa getting it. Following the loss at Narshe, Terra would not get all Esper-like and flee to Zozo, so you'd never meet up with Ramuh. Good-bye espers, leaving Terra as the only potential magic-user.

You wouldn't be able to do anything in the Opera House without "Maria", so kiss Setzer and his airship good-bye.

After a long boat-ride to Vector, you sneak into the Magitek Factory. Because you don't have Ramuh, Ifrit and Shiva sacrifice themselves rather than join you. At the end, Kekfa captures the entire party because Celes doesn't save you, nor does Cid consider helping you out because he remains true to Celes.

With no esper to reveal Terra's true self, you can't get tricked into opening the Sealed Gate, which means no false peace. Also, as a result, you miss out on Strago and Relm.

Kefka and the Emperor manage to find and activate the statues, which separates the floating continent from the world but, seeing as how you don't have Setzer, you are unable to follow. The world gets readjusted, and most likely fall into the molten core of the earth during all the changes.

End of game. You lose! =P