Here is the full list of all 42 Lightning Returns: Final Fantasy XIII achievements worth 1,000 gamerscore.
Proof of upgrading accessories 30 times.
Proof of modifying shields 30 times.
Proof of modifying weapons 30 times.
Proof of improving your first shield. Use it wisely to guard yourself.
Proof of improving your first weapon. Did you make something worthy?
Proof of upgrading your first accessory. Did you find the experience thrilling?
Proof of the true savior, who overthrew even the god of light to lead the people to a new world.
Proof of restoring a sword, once broken, to its former glory and power.
Proof of obtaining the ultimate garb, imbued with destructive magic.
Proof of mastering all creation and conquering even the Ultimate Lair.
Proof of making the impossible possible by using Eradia to bring the world a 14th day.
Proof of achieving victory in the lists of the Battle Arena 10 times.
Proof of victory over the dragon Aeronite who brought terror to the Dead Dunes.
Proof of obtaining an elixir. It's so rare that it seems almost a waste to use it, doesn't it?
Proof of building strong bridges to span the depths between continents, making all the world one.
Proof of a brave warrior who has managed to claim 50 soul seeds from the Chaos.
Proof of defeating 10 Last Ones, exterminating forever 10 different species of monster.
Proof of helping a father and son reunite, bringing back a smile that seemed long lost.
Proof of one who has visited the temple that towers over the Wildlands and touched the great Chaos.
Proof of riding upon all of the great monorail lines that cross this shrinking world.
Proof of one who has made it through the Dead Dunes to find ancient treasure.
Proof of hunting down more than 30 lizards in the shifting sands of the Dead Dunes.
Proof of clearing 25 side quests. It is a great feat to lead so many souls to salvation.
Proof of victory over 500 foes in battle.
Proof of dealing damage so great that it goes beyond all reason or expectation.
Proof of obtaining 30 different garb.
Proof of clearing 25 quests that have appeared writ on the Canvas of Prayers.
Proof of one who has seen through the dark mysteries that lurked in Luxerion, bringing justice.
Proof of defeating your first Last One, the final specimen of a species on the verge of extinction.
Proof of nursing the holy chocobo back to full health among the rich pastures of the Wildlands.
Proof of victory over 300 foes in battle.
Proof of synthesizing abilities 30 times.
Proof of one who has stood upon the stage in glittering Yusnaan, bringing peace to the Patron.
Proof of customizing the color of one of your garb. Let your true colors shine through.
Proof of one who has used 50 EP.
Proof of victory over 100 foes in battle.
Proof of clearing 5 side quests. It is a fine beginning, but the journey is still long.
Proof of staggering enemies 50 times with fearsome attacks. Do not ever let them rest!
Proof of synthesizing your first ability. Did it prove useful?
Proof of customizing your first schema. Continue on this path to find your own style.
Proof of one who has mastered the basics of this world and begun a great journey.
Proof of successfully guarding against an enemy's attack with perfect timing.