Here is the full list of all 41 Hyperdimension Neptunia Re;Birth2: Sisters Generation achievements.
Watched the Holy Sword Ending.
Fought 500 battles.
Watched the Conquest Ending.
Performed an 80-hit combo.
Inflicted over 100,000 points of damage.
Fought 100 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.
Cleared Chapter 2.
You have met Rom and Ram.
You have met Uni.
Made use of Stella's ☆ Dungeon for the first time.
Created your first Game Disc.
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.
You played so much, everyone now agrees that Nepgear is a good main character, too!
Cleared Chapter 6.
Cleared Chapter 7.
Obtained a total of 100 million Credits.
All characters have attained Level 99.
Discovered 200 Plans.
Cleared all Stella's ☆ Dungeon levels.
Histoire joined the party.
Kei Jinguji joined the party.
Mina Nishizawa joined the party.
Chika Hakozaki joined the party.
Watched the Human Ending.
Watched the Planeptune Ending.
Watched the Leanbox Ending.
Watched the Lastation Ending.
Watched the Lowee Ending.
Defeated the hidden boss, Delphinus.
Watched the True Ending.