Here is the full list of all 31 Cabin Fever achievements.
Show up a little too late
Get all 8 endings
Get into a car accident
Fall into a forest ravine
Stay inside and lock the doors
Jump
Seek treatment, just like you promised
Discover the heart Mallory stitched into your ripped jeans
Accept the offered treatment
Get the phone number wrong
Complete Chapter 8: Infection
Live happily ever after
Remember the phone number (pretty impressive!)
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
Complete Chapter 1: Prologue