Here is the full list of all 41 Hyperdimension Neptunia Re;Birth2: Sisters Generation achievements.
Watched the Leanbox Ending.
Watched the Normal Ending.
Cleared Chapter 5.
Cleared Chapter 3.
Performed an 80-hit combo.
Inflicted over 100,000 points of damage.
Cleared Chapter 2.
Made use of Stella's ☆ Dungeon for the first time.
Used the Remake System for the first time.
Fought 100 battles.
You have met Rom and Ram.
You have met Uni.
Cleared Chapter 1.
Engaged in your first random encounter.
Created your own original combo setup.
You began your adventure.
You played so much, everyone now agrees that Nepgear is a good main character, too!
Cleared Chapter 4.
Cleared Chapter 6.
Cleared Chapter 7.
Nepgear's HDD version has been powered up!
Uni's HDD version has been powered up!
Rom's and Ram's HDD versions have been powered up!
Fought 500 battles.
Obtained a total of 100 million Credits.
Created your first Game Disc.
All characters have attained Level 99.
Discovered 200 Plans.
Cleared all Stella's ☆ Dungeon levels.
Histoire joined the party.
Kei Jinguji joined the party.
Mina Nishizawa joined the party.
Chika Hakozaki joined the party.
Watched the Human Ending.
Watched the Planeptune Ending.
Watched the Lastation Ending.
Watched the Lowee Ending.
Defeated the hidden boss, Delphinus.
Watched the Conquest Ending.
Watched the Holy Sword Ending.
Watched the True Ending.