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