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.
Watched the Leanbox Ending.
Watched the Lowee Ending.
Watched the Lastation Ending.
Watched the Planeptune Ending.
Watched the Human Ending.
Watched the Holy Sword Ending.
Discovered 200 Plans.
Watched the Conquest Ending.
Cleared all Stella's ☆ Dungeon levels.
Defeated the hidden boss, Delphinus.
All characters have attained Level 99.
Kei Jinguji joined the party.
Chika Hakozaki joined the party.
Mina Nishizawa joined the party.
Histoire joined the party.
Watched the True Ending.
Cleared Chapter 7.
Cleared Chapter 6.
Fought 500 battles.
Performed an 80-hit combo.
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!
Inflicted over 100,000 points of damage.
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Cleared Chapter 3.
Cleared Chapter 2.
Fought 100 battles.
Made use of Stella's ☆ Dungeon for the first time.
You have met Rom and Ram.
Created your own original combo setup.
Created your first Game Disc.
Used the Remake System for the first time.
You have met Uni.
Cleared Chapter 1.
Engaged in your first random encounter.
You began your adventure.