#8 Starcraft 2: Heart of the Swarm
Many fans were skeptical of Blizzard's decision to split the Starcraft 2 campaign into three separate releases, but now that we've all had some time to digest Wings of Liberty, the advantage of giving each race its own full length story is obvious. Heart of the Swarm should really drive that point home, as no character in the Starcraft canon is more deserving of an epic tale than the Queen of Blades herself, Sarah Kerrigan, especially given the cliffhanger ending of the last game.
Only in it for the multiplayer? No worries. Heart of the Swarm will bring a handful of new units for all races — three apiece for the Protoss and Terran and at least two for the Zerg — as well as some significant balance changes that should change the metagame dramatically.