Something like BioWare's Mass Effect has a powerful story and characters, the endless nature of the MMO and the need for the developer to keep players engaged so they'll keep that subscription active means there can't really be a true termination, even if there are climactic events, though games like Turbine's Lord of the Rings Online try to address that. That being said, Blizzard has built in much more narrative across the zones of Northrend, anchored by frequent appearances by Arthas, which makes the leveling process a more interesting endeavor.One of the more involved questlines in a zone called Dragonblight fleshes out more of Arthas' history, his transformation from noble prince to embodiment of evil, and culminates in a lengthy cut-scene surrounding the Wrath Gate (Black Gate?) that gives players a better sense of what's going on in the world at large, and with a follow-up questline that spans the old world and provides a nice connection between the new and existing content

Like in the Death Knight opening sequences, players will get plenty of opportunity to interact with the Scourge's heavily armored leader. He tends to show up all over the place, after seemingly mundane quests in the Howling Fjord to the finale of a dungeon run through Drak'Tharon Keep on the borders of Grizzly Hills and Zul'Drak. He'll spout sinister lines with a Dr. Claw-like cadence and whether you take him seriously or smirk at his overwrought malevolence, you can't help but pay attention when he raises his sword, Frostmourne, to single out a victim or emphasize a point.