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