Here is the full list of all 61 NGU IDLE achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Obtain 1 Quadrillion of Resource 3!
Defeated the Traitor and earned the final END piece.
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!
Obtain 1 Million of Resource 3!
Wishes Unlocked!
Obtain 1 Trillion Magic!
Obtain over 1 Trillion Energy!
You can give this resource its own name in the settings menu!
Hacks Unlocked!
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!
Obtain 1 Billion Magic!
Boss 200 Defeated! Oh snap, they have red skulls now!
Questing Unlocked!
Boss 190 Defeated!
Boss 180 Defeated!
Obtain over 1 Billion Energy!
Boss 170 Defeated!
Boss 160 Defeated!
Boss 150 Defeated!
Boss 140 Defeated!
Boss 130 Defeated!
Survive an attack from an Exploder type enemy!
Boss 120 Defeated!
Completed your first troll challenge... I'm sorry :c
Beards Unlocked!
Wear a set of gear on your body, all at level 69.
Boss 110 Defeated!
Obtain 1 Million Magic!
Boss 100 Defeated! Ooh, now the skull is all blue and shiny.
Boss 90 Defeated!
Gold Diggers Unlocked!
Boss 80 Defeated!
Yggdrasil Unlocked!
Boss 70 Defeated!
Obtain over 1 Million Energy!
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.