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