Here is the full list of all 25 The Cat Lady achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Kill The Eye of Adam yourself in Chapter 7.
Hold tight to your gas mask in Chapter 7.
Unlock the secret "golden ending".
Buy time for Jesse in Chapter 6.
Choose your words carefully in Chapter 5.
Stay away from Gladys' cleaver in Chapter 4.
Don't give up on the foggy orchard in Chapter 4.
Keep your cool throughout Chapter 3.
Solve Crow's riddle in Chapter 2.
Answer Liz's questions correctly in Chapter 2.
Trust the Queen of Maggots in Chapter 1.
Let Mitzi kill The Eye of Adam in Chapter 7.
Complete the final chapter.
Prevent Mitzi from killing The Eye of Adam in Chapter 7.
Give up your gas mask in Chapter 7.
Complete the sixth chapter.
Complete the fifth chapter.
Complete the fourth chapter.
Complete the third chapter.
Stand up to Bryan in Chapter 3.
Complete the second chapter.
Use the mace to kill Doctor X in Chapter 2.
Use the spear to kill Doctor X in Chapter 2.
Complete the first chapter.
Disregard the Queen of Maggots in Chapter 1.