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