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.
Defeated the hidden boss, Delphinus.
Obtained a total of 100 million Credits.
Kei Jinguji joined the party.
Discovered 200 Plans.
All characters have attained Level 99.
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.
Fought 500 battles.
Cleared Chapter 6.
Watched the Human Ending.
Watched the Planeptune Ending.
Watched the Leanbox Ending.
Chika Hakozaki joined the party.
Watched the Lowee Ending.
Watched the Lastation Ending.
Performed an 80-hit combo.
Watched the Normal Ending.
Cleared Chapter 5.
Rom's and Ram's HDD versions have been powered up!
Inflicted over 100,000 points of damage.
Fought 100 battles.
Uni's HDD version has been powered up!
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Made use of Stella's ☆ Dungeon for the first time.
Cleared Chapter 3.
Cleared Chapter 2.
Created your first Game Disc.
You have met Rom and Ram.
You have met Uni.
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.