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.
All characters have attained Level 99.
Chika Hakozaki joined the party.
Watched the Lowee Ending.
Mina Nishizawa joined the party.
Watched the Lastation Ending.
Kei Jinguji joined the party.
Watched the Planeptune Ending.
Histoire joined the party.
Watched the Human Ending.
Watched the Normal Ending.
Defeated the hidden boss, Delphinus.
Cleared all Stella's ☆ Dungeon levels.
Watched the Holy Sword Ending.
Watched the Conquest Ending.
Discovered 200 Plans.
Obtained a total of 100 million Credits.
Watched the True Ending.
Cleared Chapter 7.
Cleared Chapter 6.
Cleared Chapter 5.
Fought 500 battles.
Rom's and Ram's HDD versions have been powered up!
Performed an 80-hit combo.
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.
Created your first Game Disc.
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.
Created your own original combo setup.
Engaged in your first random encounter.
You began your adventure.