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.
Discovered 200 Plans.
Watched the Leanbox Ending.
Chika Hakozaki joined the party.
Watched the Lowee Ending.
Defeated the hidden boss, Delphinus.
Watched the Lastation Ending.
Kei Jinguji joined the party.
Watched the Planeptune Ending.
Watched the Human Ending.
Watched the Normal Ending.
Watched the True Ending.
Mina Nishizawa joined the party.
Histoire joined the party.
Cleared Chapter 7.
Cleared Chapter 6.
Performed an 80-hit combo.
Watched the Holy Sword Ending.
Created your first Game Disc.
Watched the Conquest Ending.
Cleared Chapter 5.
Fought 500 battles.
Rom's and Ram's HDD versions have been powered up!
Inflicted over 100,000 points of damage.
Uni's HDD version has been powered up!
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Cleared Chapter 3.
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.
Used the Remake System for the first time.
Engaged in your first random encounter.
Created your own original combo setup.
You began your adventure.