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