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