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!
Discovered 200 Plans.
Obtained a total of 100 million Credits.
Cleared all Stella's ☆ Dungeon levels.
Watched the Holy Sword Ending.
Watched the Human Ending.
Watched the Lastation Ending.
Watched the Leanbox Ending.
Watched the Lowee Ending.
All characters have attained Level 99.
Mina Nishizawa joined the party.
Chika Hakozaki joined the party.
Watched the Conquest Ending.
Watched the True Ending.
Defeated the hidden boss, Delphinus.
Cleared Chapter 7.
Kei Jinguji joined the party.
Cleared Chapter 6.
Fought 500 battles.
Histoire joined the party.
Watched the Planeptune Ending.
Watched the Normal Ending.
Fought 100 battles.
Created your first Game Disc.
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.
Cleared Chapter 2.
You have met Rom and Ram.
You have met Uni.
Made use of Stella's ☆ Dungeon for the first time.
Used the Remake System for the first time.
Cleared Chapter 1.
Engaged in your first random encounter.
Created your own original combo setup.
You began your adventure.