A new developer diary from Square Enix looking at the Lightning Returns: Final Fantasy 13 takes players to look at the title’s doomsday clock mechanics and more.

The doomsday clock has players accomplish specific tasks within 13 days. The schedule not only affects the game’s outcome but also the locations. Characters behave according to a 24-hour clock, with locations being safe during the day and dangerous at night.

Lightning Returns launches in February 2014.