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.
Watched the True Ending.
Cleared Chapter 7.
All characters have attained Level 99.
Histoire joined the party.
Chika Hakozaki joined the party.
Kei Jinguji joined the party.
Mina Nishizawa joined the party.
Cleared Chapter 6.
Watched the Lowee Ending.
Watched the Human Ending.
Watched the Lastation Ending.
Watched the Leanbox Ending.
Watched the Planeptune Ending.
Watched the Normal Ending.
Watched the Holy Sword Ending.
Fought 500 battles.
Watched the Conquest Ending.
Cleared Chapter 5.
Rom's and Ram's HDD versions have been powered up!
Inflicted over 100,000 points of damage.
Performed an 80-hit combo.
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.
You have met Rom and Ram.
Fought 100 battles.
Made use of Stella's ☆ Dungeon for the first time.
Created your first Game Disc.
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.