Here is the full list of all 23 Diabolical achievements.
He looks the part.
A little insanity never hurt anyone.
Zombies? No problem.
Reunite with an old...friend?
What sort of villain are you?
Begin your supervillain career.
Some crimes can be ignored.
Cyber-attacks are the way of the future.
Have you considered a career in mad science?
Learn the Count or Countess's secret.
Start a relationship with Steelheart.
Start a relationship with The Count or Countess.
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.
Cartoons are wonderful.
No one has enough responsibility to handle this.
Life wouldn't be worth living without them.
Whatever Arachnus did to Earth, it's been undone.
Power like that isn't worth messing with.