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.
Watched the True Ending.
Cleared Chapter 7.
Kei Jinguji joined the party.
Histoire joined the party.
Chika Hakozaki joined the party.
Cleared Chapter 6.
Mina Nishizawa joined the party.
Watched the Holy Sword Ending.
Watched the Human Ending.
Watched the Lowee Ending.
Watched the Lastation Ending.
Watched the Leanbox Ending.
Watched the Planeptune Ending.
Fought 500 battles.
Watched the Conquest 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!
Inflicted over 100,000 points of damage.
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Performed an 80-hit combo.
Cleared Chapter 3.
Cleared Chapter 2.
Created your first Game Disc.
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.