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