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