Here is the full list of all 61 NGU IDLE achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Boss 200 Defeated! Oh snap, they have red skulls now!
Obtain 1 Billion Magic!
Boss 190 Defeated!
Boss 180 Defeated!
Boss 170 Defeated!
Boss 160 Defeated!
Obtain over 1 Billion Energy!
Boss 150 Defeated!
Boss 140 Defeated!
Boss 130 Defeated!
Beards Unlocked!
Completed your first troll challenge... I'm sorry :c
Boss 120 Defeated!
Boss 110 Defeated!
Gold Diggers Unlocked!
Boss 100 Defeated! Ooh, now the skull is all blue and shiny.
Boss 90 Defeated!
Obtain 1 Million Magic!
Yggdrasil Unlocked!
Boss 80 Defeated!
Obtain over 1 Million Energy!
Boss 70 Defeated!
NGU's Unlocked!
Boss 60 Defeated!
I'm so proud of you.
Boss 50 Defeated!
Boss 40 Defeated!
Blood Magic Unlocked!
Boss 30 Defeated!
Boss 20 Defeated!
Wear a set of gear on your body, all at level 69.
Unlocked the Augmentation Feature!
Boss 10 is uh... it's defeated. You defeated it. The name basically says it all.
Boss 210 Defeated!
Boss 220 Defeated!
Boss 230 Defeated!
Boss 240 Defeated!
Boss 250 Defeated!
Boss 260 Defeated!
Boss 270 Defeated!
Boss 280 Defeated!
Boss 290 Defeated!
You defeated them all! Now to move on to EVIL difficulty...
Obtain over 1 Trillion Energy!
Obtain over 1 Quadrillion Energy!
Obtain 9 QUINTILLION Energy, the most you can have in the game!
Obtain 1 Trillion Magic!
Obtain 1 Quadrillion Magic!
Obtain 9 QUINTILLION Magic, the most you can have in the game!
You can give this resource its own name in the settings menu!
Obtain 1 Million of Resource 3!
Obtain 1 Billion of Resource 3!
Obtain 1 Trillion of Resource 3!
Obtain 1 Quadrillion of Resource 3!
Defeated the Traitor and earned the final END piece.
Questing Unlocked!
Hacks Unlocked!
Wishes Unlocked!
Survive an attack from an Exploder type enemy!
Took the plunge into Evil Difficulty for the first time.
F's in chat for you, 'cause you're in for a world of pain.