• The game is currently 30% complete
• This will be Lightning's last game and will end with a happy ending. The game has just one ending.
• The first FFXIII was story driven, meaning that the story pulled the player along. FFXIII-2 was player driven, meaning players selected the story. Lightning Returns is World Driven, meaning players have to consider how they interact with the changing world.
• The game's in-game time works out to one day being the equivalent of one to two hours of real time. There will be increases and decreases in time.
• The game is meant to be played and cleared multiple times. The volume is not such that it will take many tens of hours to clear once.
• People from XIII-2 haven't died. Because of the effects of the chaos (I'm not sure if this is the proper English word), people have stopped aging and don't get old.
• The Novus world has four continents, two natural and two city-type.
• Depending on your actions, the remaining life of the world could decrease, and the game could end before the 13 day limit.
• There are some times when helping someone will decrease the life of the world.
• Defeating some enemies and clearing some quests will increase the life of the world.
• Lightning is all by herself in battle, allowing you to concentrate more than when you had to control a party.
• Lightning has become a considerably more refined person.
• You can freely move around during battle. Some elements of the battle system are timing-based.
• The battle system is close to action. There's an ATB gauge.
• During battle, you don't select menu commands. Instead, you select abilities which have been assigned to buttons.
• Hope will give guidance to Lightning via wireless com.
• The city has clocks everywhere showing the constant progression of time.

http://andriasang.com/con2l3/lightning_returns_details/