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.
Watched the True Ending.
Cleared Chapter 7.
Discovered 200 Plans.
Obtained a total of 100 million Credits.
Defeated the hidden boss, Delphinus.
All characters have attained Level 99.
Kei Jinguji joined the party.
Cleared Chapter 6.
Mina Nishizawa joined the party.
Watched the Holy Sword Ending.
Watched the Planeptune Ending.
Histoire joined the party.
Watched the Lastation Ending.
Watched the Leanbox Ending.
Chika Hakozaki joined the party.
Watched the Lowee Ending.
Watched the Human Ending.
Fought 500 battles.
Watched the Conquest Ending.
Fought 100 battles.
Watched the Normal Ending.
Performed an 80-hit combo.
Cleared Chapter 5.
Rom's and Ram's HDD versions have been powered up!
Uni's HDD version has been powered up!
Inflicted over 100,000 points of damage.
Created your first Game Disc.
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Cleared Chapter 3.
Cleared Chapter 2.
You have met Rom and Ram.
Made use of Stella's ☆ Dungeon for the first time.
Created your own original combo setup.
Used the Remake System for the first time.
You have met Uni.
Cleared Chapter 1.
Engaged in your first random encounter.
You began your adventure.