The EPISODE 4 Add-on for Muffles' Life Sentence has 11 achievements.
Find where the rubber duck is hiding.
Get Cardor's face.
Get Twinkle's face.
Open all stashes in Episode 4.
Find all memories in Episode 4.
Help DPP solve the murder mystery.
Get Tzino's face.
Win the Mad Ox battle of the bands.
Solidify Pete and the Translator's love.
Finish Episode 4.
Odie helped Suzan feel a little better.