#12 Vanguard
Vanguard may not be a game you've played, but it's an MMORPG with lands so big that players had to walk for miles before they even ran into each other—which was, perhaps, the game's biggest flaw upon its release half a decade ago.
The geography of Vanguard (which is set in the mythical fantasy world of Telon) is split into three distinct regions—Thestra, Kojan, and Qalia. Thestra embodies just about every European medieval fantasy world you could imagine, Kojan is distinctly Asian, and Qalia is like the land out of the 1001 Nights—or, you know, Arabia.
Now that it's going to go free-to-play, the servers may become more populated than they've ever been and players won't have to walk for miles just to see each other.