The title “Guild Wars” implies PvP or player versus player, How will this aspect work, and will players have the option if they want to participate in it or not?
You will always have the choice to participate in PvP, and will never find yourself being random player killed. Guild Wars is a mission based game, and the choice is yours whether you would prefer to enter into cooperative or competitive missions. You will never find yourself attacked by surprise by another player, which will eliminate much grief. After you’ve learned the game and have built up a character through questing you may choose to participate in battlegrounds, where teams of players engage each other in combat, and then beyond in casual team warfare. The unpleasant character costs associated with death in other games, such as experience loss, item decay or loss are not a factor in Guild Wars.