Here is the full list of all 41 Hyperdimension Neptunia Re;Birth2: Sisters Generation achievements.
You played so much, everyone now agrees that Nepgear is a good main character, too!
All characters have attained Level 99.
Kei Jinguji joined the party.
Mina Nishizawa joined the party.
Chika Hakozaki joined the party.
Histoire joined the party.
Cleared all Stella's ☆ Dungeon levels.
Watched the Holy Sword Ending.
Watched the Conquest Ending.
Defeated the hidden boss, Delphinus.
Obtained a total of 100 million Credits.
Watched the True Ending.
Cleared Chapter 7.
Discovered 200 Plans.
Cleared Chapter 6.
Watched the Human Ending.
Watched the Lowee Ending.
Watched the Leanbox Ending.
Watched the Planeptune Ending.
Watched the Lastation Ending.
Watched the Normal Ending.
Cleared Chapter 5.
Rom's and Ram's HDD versions have been powered up!
Uni's HDD version has been powered up!
Created your first Game Disc.
Fought 500 battles.
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Cleared Chapter 3.
Performed an 80-hit combo.
Cleared Chapter 2.
Inflicted over 100,000 points of damage.
Fought 100 battles.
You have met Rom and Ram.
Made use of Stella's ☆ Dungeon for the first time.
You have met Uni.
Cleared Chapter 1.
Used the Remake System for the first time.
Engaged in your first random encounter.
Created your own original combo setup.
You began your adventure.