This can be considered the "bad" ending of the game.
*** Spoiler - click to reveal ***This trophy requires that you refuse to kill your brother Julius in order to build the bridge to the Land of Cannan. When you confront Julius you MUST continuously refuse to kill him. After a time, your party members will turn on you. You must defeat all 8 in battle, one at a time systematically. Once this is done, you will see a cut scene with Julius and Ludger.
After the credits have finished, you will get this trophy.