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 Holy Sword Ending.
Defeated the hidden boss, Delphinus.
Discovered 200 Plans.
Obtained a total of 100 million Credits.
Watched the Lowee Ending.
Watched the Human Ending.
Watched the Leanbox Ending.
Cleared all Stella's ☆ Dungeon levels.
Watched the Lastation Ending.
Watched the Conquest Ending.
Watched the True Ending.
All characters have attained Level 99.
Cleared Chapter 7.
Kei Jinguji joined the party.
Mina Nishizawa joined the party.
Cleared Chapter 6.
Chika Hakozaki joined the party.
Performed an 80-hit combo.
Histoire joined the party.
Watched the Planeptune Ending.
Fought 500 battles.
Watched the Normal Ending.
Made use of Stella's ☆ Dungeon for the first time.
Cleared Chapter 5.
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!
Created your first Game Disc.
Cleared Chapter 4.
Nepgear's HDD version has been powered up!
Cleared Chapter 3.
Cleared Chapter 2.
Fought 100 battles.
You have met Rom and Ram.
Used the Remake System for the first time.
You have met Uni.
Cleared Chapter 1.
Engaged in your first random encounter.
Created your own original combo setup.
You began your adventure.