Here is the full list of all 61 Days Gone achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Complete the Infestation Exterminator storyline
Collect 541 Items from corpses
Gain the Allied Trust status with three different Encampments
Complete the Ambush Camp Hunter storyline
Complete the World's End storyline
Apply 100 scrap to your bike
Complete the Marauder Camp Hunter storyline
Unlock over 50% of the collectibles
Complete the story of Days Gone
Take revenge, once and for all
Receive the Allied Trust status with an Encampment
Ride out to take back what's yours
Collect 989 Freaker Ears
Purchase an upgrade under the Performance, Visual, and Paint Categories for your bike
Unlock 30 skills
Defeat your first Horde
Kill 200 Enemies with a Crafted Weapon
Max out either your Health, Stamina, or Focus
Reconnect with what you lost
See a familiar face
Take to the road alone
Return the favor
Rescue 10 survivors
Spend 20,000 credits at one Encampment
Clear all Ambush Camps, Infestations, and NERO Checkpoints in a single region
Unlock 15 skills
Check up on Boozer
Drive south with Boozer
Craft 50 items
Make a delivery to Tucker or Copeland
Discover what happened to NERO
Unlock your first skill
Upgrade either your Health, Stamina, or Focus for the first time
Upgrade your bike for the first time
Sell Animal Meat or Plants to any Encampment
Get out of Crazy Willie's
Unlock your first collectible
Go above and BEYOND, unlocking every trophy in Days Gone
Accumulate 10 minutes of drifting while on your bike
Kill a Breaker, Reacher, or Rager with a knife
Get 100 stealth kills
Kill an enemy with every type of crossbow bolt
Use nitro and drift at the same time on your bike for at least 5 seconds
Unlock over 75% of collectibles
Unlock 45 skills
Knock down 12 Anarchist Cairns
Complete the story of Days Gone in Survival Mode
Defeat a Horde in under 1 minute in Survival Mode
Earn your first Bronze Medal in a Challenge
Earn your first Silver Medal in a Challenge
Earn your first Gold Medal in a Challenge
Earn a Gold Medal in a Challenge with a Character Skin and Custom Accent equipped
Fully upgrade any Ring
Earn a Gold Medal in all Challenges
Earn a Medal in all Sub-Challenges
Spend 3000 credits on your Loadout
Reach the Founder Rank
Unlock all Patches
Complete the story of Days Gone in New Game+
Complete the story of Days Gone on Hard II or Survival II in New Game+
Kill an enemy with every type of ammo from a mysterious weapon earned in New Game+