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!
Watched the Leanbox Ending.
Fought 500 battles.
Cleared all Stella's ☆ Dungeon levels.
Watched the Human Ending.
Watched the Lowee Ending.
Watched the Lastation Ending.
Watched the True Ending.
Cleared Chapter 7.
All characters have attained Level 99.
Mina Nishizawa joined the party.
Kei Jinguji joined the party.
Histoire joined the party.
Chika Hakozaki joined the party.
Cleared Chapter 6.
Discovered 200 Plans.
Obtained a total of 100 million Credits.
Performed an 80-hit combo.
Watched the Holy Sword Ending.
Watched the Conquest Ending.
Defeated the hidden boss, Delphinus.
Watched the Planeptune 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!
Inflicted over 100,000 points of damage.
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Cleared Chapter 3.
Cleared Chapter 2.
Created your first Game Disc.
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.