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