The trailer highlights the main storyline of the game as well as some gameplay mechanics. (gamingtrend.com)
The one other option I see is to wrap up the big storyline of a game, then continue with smaller, more minor story quests for so long as the game persists. (mmobro.com)
This represents the real storyline of the game and following it is the only way to discover the truth behind the incident. (mundorare.com)