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