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