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