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!
Cleared all Stella's ☆ Dungeon levels.
Discovered 200 Plans.
Obtained a total of 100 million Credits.
Watched the Holy Sword Ending.
Watched the True Ending.
Defeated the hidden boss, Delphinus.
Cleared Chapter 7.
All characters have attained Level 99.
Kei Jinguji joined the party.
Cleared Chapter 6.
Histoire joined the party.
Chika Hakozaki joined the party.
Watched the Conquest Ending.
Watched the Human Ending.
Watched the Planeptune Ending.
Watched the Lastation Ending.
Watched the Leanbox Ending.
Watched the Lowee Ending.
Watched the Normal Ending.
Mina Nishizawa joined the party.
Cleared Chapter 5.
Rom's and Ram's HDD versions have been powered up!
Uni's HDD version has been powered up!
Fought 500 battles.
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.
Created your first Game Disc.
You have met Rom and Ram.
Fought 100 battles.
You have met Uni.
Made use of Stella's ☆ Dungeon for the first time.
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.