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