Fabula Nova Crystallis: Final Fantasy

Fabula Nova Crystallis: Final Fantasy XIII is the collective name of a trilogy of games made under the Final Fantasy XIII label by Japanese console developer Square Enix. Made in the same vein as the Compilation of Final Fantasy VII collection, Fabula Nova Crystallis, which means "the new tale of the crystal," is nevertheless based on various worlds and different characters, but each game will be "ultimately based on and expand upon a common mythos." 

The games within Fabula Nova Crystallis are:


 * Final Fantasy XIII
 * Final Fantasy Agito XIII
 * Final Fantasy Versus XIII

Each of the games are made by a different team of developers within Square Enix.

According to Square Enix, the Fabula Nova Crystallis is not solely restricted to these three games, and other new developments are already underway and will be announced in time. A title called Final Fantasy Haeresis XIII, for example, was filed for trademark status on May 1, 2006.

Translation
Square Enix's page states that Fabula Nova Crystallis translates to "the new tale of the crystal." However, this is not quite accurate--the Latin word for crystal is "crystallus -i," which is second declension. Fabula Nova Crystalli would mean "the new tale of the crystal."