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