Story related, cannot be missed.
This trophy is called Reborn and is awarded for completing the first area of the game (The Well Of Souls). From the start of the game, you progress pretty linearly along the level. This area serves as a tutorial as Encel (the Gnome which accompanies you after you save him) continually has you try some of the game's different weapons and magic as you make your way through.
At the end of the level you will face off against a Troll and 2 Tuatha. As combat can go a number of different ways (one of this game's greatest strengths) I will not outline a strategy, but will mention to watch out when the Troll raises the club over his head and charges you, his hit will do massive damage.
After they are defeated, head up the stairs and out into the lands of Dalentarth. As soon as the game loads with you outside, your quest should complete and this trophy should unlock.