Here is the full list of all 44 Open Country trophies - there are 26 bronze, 15 silver, 2 gold and 1 platinum.
Spend 1 hour in the Practice Mode of the Weapon Range
Shoot down the Crown Target 30 times in Challenge Mode
Complete all Shooting Range Challenges
Walk 100 km on foot
Beat a vehicle time trial record
Catch your first fish
Spend 3 hours on the Summer Map
Use the bandage 3 times
Spend 3 hours on the Autumn Map
Survive 10 consecutive days without eating meat
Survive 10 days
Make 30 transactions at the Trader
Reach Bonding Level 5 with the Dog
Walk 10 km on foot
Unlock any skill to the max
Make 3 transactions at the Trader
Survive 1 Days
Walk 1 km on foot
Hunt your first animal
Get all trophies in Open Country
Survive 100 days
Survive 10 consecutive days without drinking water
Catch 50 fishes
Spend 3 hours on the Winter Map
Harvest every type of animal present on the Autumn Map
Harvest every type of animal present on the Summer Map
Harvest every type of animal present on the Winter Map
Unlock all skills to the max
Beat 10 vehicle time trial records
Play 1 multiplayer co-op match
Play 10 multiplayer co-op matches
Win 1 multiplayer versus match
Win 10 multiplayer versus matches
Catch 10 of any Trophy fishes
Use the Dog to Fetch 30 downed animals
Maintain the Dog’s Hunger level over 90% for a full day
Get all male character clothes
Get all female character clothes
Use the bandage 30 times
Hunt a wolf with any improvised weapon
Find All Landmarks
Find All Locations
Complete the game with Male Character
Complete the game with Female Character