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.
Discovered 200 Plans.
Defeated the hidden boss, Delphinus.
Watched the Leanbox Ending.
Watched the Lowee Ending.
All characters have attained Level 99.
Mina Nishizawa joined the party.
Chika Hakozaki joined the party.
Kei Jinguji joined the party.
Watched the Human Ending.
Watched the Lastation Ending.
Watched the Planeptune Ending.
Histoire joined the party.
Watched the True Ending.
Cleared Chapter 7.
Cleared Chapter 6.
Watched the Holy Sword Ending.
Performed an 80-hit combo.
Fought 500 battles.
Created your first Game Disc.
Watched the Conquest Ending.
Inflicted over 100,000 points of damage.
Fought 100 battles.
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!
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.
You have met Uni.
Used the Remake System for the first time.
Cleared Chapter 1.
Engaged in your first random encounter.
Created your own original combo setup.
You began your adventure.