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.
All characters have attained Level 99.
Discovered 200 Plans.
Kei Jinguji joined the party.
Watched the Holy Sword Ending.
Watched the Human Ending.
Watched the Lastation Ending.
Watched the Leanbox Ending.
Chika Hakozaki joined the party.
Obtained a total of 100 million Credits.
Watched the Lowee Ending.
Watched the Planeptune Ending.
Watched the Normal Ending.
Watched the True Ending.
Histoire joined the party.
Mina Nishizawa joined the party.
Defeated the hidden boss, Delphinus.
Cleared Chapter 7.
Cleared Chapter 6.
Fought 500 battles.
Watched the Conquest 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.
Performed an 80-hit combo.
Fought 100 battles.
Created your first Game Disc.
You have met Rom and Ram.
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.