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.
Mina Nishizawa joined the party.
Watched the Lowee Ending.
Watched the Planeptune Ending.
Watched the Conquest Ending.
Watched the Human Ending.
Cleared all Stella's ☆ Dungeon levels.
Watched the Lastation Ending.
Kei Jinguji joined the party.
Watched the Holy Sword Ending.
Defeated the hidden boss, Delphinus.
Discovered 200 Plans.
Watched the True Ending.
Cleared Chapter 7.
Histoire joined the party.
Cleared Chapter 6.
Chika Hakozaki joined the party.
Fought 500 battles.
Watched the Leanbox Ending.
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!
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.
Cleared Chapter 1.
Made use of Stella's ☆ Dungeon for the first time.
Created your own original combo setup.
Used the Remake System for the first time.
Engaged in your first random encounter.
You began your adventure.