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.
Defeated the hidden boss, Delphinus.
Obtained a total of 100 million Credits.
Discovered 200 Plans.
All characters have attained Level 99.
Performed an 80-hit combo.
Watched the True Ending.
Cleared Chapter 7.
Kei Jinguji joined the party.
Cleared Chapter 6.
Watched the Leanbox Ending.
Chika Hakozaki joined the party.
Watched the Lowee Ending.
Mina Nishizawa joined the party.
Watched the Lastation Ending.
Watched the Planeptune Ending.
Histoire joined the party.
Watched the Human Ending.
Watched the Holy Sword Ending.
Watched the Conquest Ending.
Fought 500 battles.
Watched the Normal Ending.
Inflicted over 100,000 points of damage.
Cleared Chapter 5.
Rom's and Ram's HDD versions have been powered up!
Fought 100 battles.
Uni's HDD version has been powered up!
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.
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.
Created your own original combo setup.
Engaged in your first random encounter.
You began your adventure.