Here is the full list of all 31 Cabin Fever achievements.
Fall into a forest ravine
Get all 8 endings
Get into a car accident
Show up a little too late
Jump
Seek treatment, just like you promised
Discover the heart Mallory stitched into your ripped jeans
Get the phone number wrong
Live happily ever after
Remember the phone number (pretty impressive!)
Complete Chapter 8: Infection
Accept the offered treatment
Hitch a ride into the city
Get caught in your own bear trap
Read the spam every time
Complete Chapter 7: Integration
Complete Chapter 6: Attachment
Savor the most amazing breakfast ever with Mallory
Complete Chapter 5: Maturation
Ask Mallory about her favorite memory
Pull up over 420 weeds
Read the spam once
Complete Chapter 4: Growth
Introduce Mallory to the baby chicks
Have a nice breakfast with Mallory!
Complete Chapter 3: Germination
Suffer through "breakfast" with Mallory
Complete Chapter 2: Seed
Stay inside and lock the doors
Complete Chapter 1: Prologue