Here is the full list of all 23 Diabolical achievements.
Cartoons are wonderful.
Zombies? No problem.
Whatever Arachnus did to Earth, it's been undone.
He looks the part.
Start a relationship with The Count or Countess.
Have you considered a career in mad science?
Cyber-attacks are the way of the future.
What sort of villain are you?
Life wouldn't be worth living without them.
Learn the Count or Countess's secret.
Start a relationship with Steelheart.
A little insanity never hurt anyone.
Reunite with an old...friend?
Begin your supervillain career.
Some crimes can be ignored.
Victory goes to your enemies.
Every villain wants to do this, right?
At last, you'll receive the recognition you deserve.
Who says a villain can't have noble goals?
Let's see if people really want freedom from the law.
They'll never forget you if they always see you.
No one has enough responsibility to handle this.
Power like that isn't worth messing with.