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.
Watched the Leanbox Ending.
Watched the Human Ending.
Discovered 200 Plans.
Defeated the hidden boss, Delphinus.
All characters have attained Level 99.
Chika Hakozaki joined the party.
Kei Jinguji joined the party.
Watched the True Ending.
Cleared Chapter 7.
Cleared Chapter 6.
Watched the Holy Sword Ending.
Watched the Conquest Ending.
Watched the Lastation Ending.
Fought 500 battles.
Watched the Lowee Ending.
Mina Nishizawa joined the party.
Watched the Planeptune Ending.
Histoire joined the party.
Obtained a total of 100 million Credits.
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!
Cleared Chapter 3.
Performed an 80-hit combo.
Inflicted over 100,000 points of damage.
Cleared Chapter 2.
Fought 100 battles.
You have met Rom and Ram.
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.
Created your own original combo setup.
Engaged in your first random encounter.
You began your adventure.