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!
Watched the Human Ending.
Watched the Planeptune Ending.
Watched the Leanbox Ending.
Watched the Lastation Ending.
Watched the Lowee Ending.
Watched the Conquest Ending.
Watched the Holy Sword Ending.
Histoire joined the party.
Kei Jinguji joined the party.
Mina Nishizawa joined the party.
Watched the True Ending.
All characters have attained Level 99.
Cleared all Stella's ☆ Dungeon levels.
Chika Hakozaki joined the party.
Defeated the hidden boss, Delphinus.
Cleared Chapter 7.
Inflicted over 100,000 points of damage.
Cleared Chapter 6.
Discovered 200 Plans.
Obtained a total of 100 million Credits.
Performed an 80-hit combo.
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!
Uni's HDD version has been powered up!
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Cleared Chapter 3.
Fought 100 battles.
Made use of Stella's ☆ Dungeon for the first time.
Cleared Chapter 2.
Used the Remake System for the first time.
You have met Rom and Ram.
You have met Uni.
Cleared Chapter 1.
Created your own original combo setup.
Engaged in your first random encounter.
You began your adventure.