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.
Discovered 200 Plans.
Watched the True Ending.
Obtained a total of 100 million Credits.
Defeated the hidden boss, Delphinus.
All characters have attained Level 99.
Chika Hakozaki joined the party.
Kei Jinguji joined the party.
Cleared Chapter 7.
Mina Nishizawa joined the party.
Cleared Chapter 6.
Histoire joined the party.
Watched the Holy Sword Ending.
Watched the Conquest Ending.
Watched the Human Ending.
Fought 500 battles.
Watched the Lastation Ending.
Watched the Lowee Ending.
Watched the Planeptune Ending.
Watched the Leanbox Ending.
Performed an 80-hit combo.
Watched the Normal Ending.
Created your first Game Disc.
Inflicted over 100,000 points of damage.
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.
Fought 100 battles.
Cleared Chapter 2.
Created your own original combo setup.
You have met Rom and Ram.
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.