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.
Unlock the secret "golden ending".
Choose your words carefully in Chapter 5.
Stay away from Gladys' cleaver in Chapter 4.
Keep your cool throughout Chapter 3.
Use the mace to kill Doctor X in Chapter 2.
Let Mitzi kill The Eye of Adam in Chapter 7.
Kill The Eye of Adam yourself in Chapter 7.
Hold tight to your gas mask in Chapter 7.
Don't give up on the foggy orchard in Chapter 4.
Disregard the Queen of Maggots in Chapter 1.
Solve Crow's riddle in Chapter 2.
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.
Buy time for Jesse in Chapter 6.
Complete the fifth chapter.
Complete the fourth chapter.
Stand up to Bryan in Chapter 3.
Complete the third chapter.
Complete the second chapter.
Use the spear to kill Doctor X in Chapter 2.
Answer Liz's questions correctly in Chapter 2.
Complete the first chapter.
Trust the Queen of Maggots in Chapter 1.