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.
Watched the Human Ending.
Watched the Leanbox Ending.
Chika Hakozaki joined the party.
Watched the Lowee Ending.
Mina Nishizawa joined the party.
Watched the Lastation Ending.
Kei Jinguji joined the party.
Watched the Holy Sword Ending.
Watched the Conquest Ending.
Defeated the hidden boss, Delphinus.
Discovered 200 Plans.
Cleared all Stella's ☆ Dungeon levels.
Watched the True Ending.
Cleared Chapter 7.
Watched the Planeptune Ending.
Histoire joined the party.
Cleared Chapter 6.
Created your first Game Disc.
Fought 500 battles.
Watched the Normal Ending.
Cleared Chapter 5.
Rom's and Ram's HDD versions have been powered up!
Made use of Stella's ☆ Dungeon for the first time.
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.
Performed an 80-hit combo.
Fought 100 battles.
You have met Rom and Ram.
You have met Uni.
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.