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.
All characters have attained Level 99.
Kei Jinguji joined the party.
Watched the Holy Sword Ending.
Watched the Human Ending.
Obtained a total of 100 million Credits.
Discovered 200 Plans.
Defeated the hidden boss, Delphinus.
Watched the True Ending.
Cleared Chapter 7.
Cleared Chapter 6.
Watched the Leanbox Ending.
Chika Hakozaki joined the party.
Histoire joined the party.
Watched the Lowee Ending.
Mina Nishizawa joined the party.
Watched the Lastation Ending.
Watched the Conquest Ending.
Watched the Planeptune 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!
Performed an 80-hit combo.
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Cleared Chapter 3.
Fought 500 battles.
Created your first Game Disc.
Cleared Chapter 2.
Inflicted over 100,000 points of damage.
You have met Rom and Ram.
Fought 100 battles.
Made use of Stella's ☆ Dungeon for the first time.
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.