Here is the full list of all 79 Broken Lines achievements.
Kill an enemy after knocking them down 3 times
Complete the campaign with 4 dead soldiers
End the campaign and get successfully extracted by a plane
End the campaign and blow up the dam
Complete the level “Consequence”
Complete Retribution level in less than 4 minutes and 12 seconds
Have a soldier desert your squad
Sacrifice a soldier to blow up the dam
Complete the level “Retribution”
Destroy a tank
Encounter the maskless enemies
Fail a boot camp level
Buy the fake grenade
Kill three enemies with one grenade
Own 0 supplies and 0 salvage
Cause 10 civilian casualties
Complete Contact level in less than 4 minutes and 4 seconds
Buy the best rifle: Mosin-Nagant Scoped Rifle
Warn the civilians about the upcoming flooding
Complete the level “Worry”
Find more than 10 supply crates in various levels during the same campaign
Buy the best shotgun: Browning Automatic 5
Complete the level “Recoil”
Find petroleum
Buy the best submachine gun: Sturmgewehr
Morgan opens up to Conner
Fry and Hailey start fighting
Complete the level “Contact”
Kill 101 enemies
Use Suppression 100 times
Unmask an enemy
Complete the level “Strength”
Complete the level “Greed”
Find a crate with explosives
Kill 5 or more enemy soldiers in a single turn
Equip a soldier with 3 abilities, 3 traits, and all equipment slots
Conner and Hailey talk about her scar
Complete the level “Survival”
Buy a weapon from Izkor
Unlock a second Trait on a Soldier
Complete the level “Clarity”
Complete the level “Release”
Release Fry from Prison
Kill an enemy officer
Complete the level “Uncertainty”
Restart a level
Gain a gold medal from a mission
Complete the level “Wreck”
Introduce yourself to the locals
Complete all boot camp levels
Have all your soldiers panic at the same time
Experience Lieutenant Brooks final words
Encounter the blocked mountain pass
Blow up the radio tower
Complete the level “Certainty”
Complete the level “Revenge”
Complete the level “Decency”
Complete the level “Cruelty”
Complete the level “Mischief”
Complete the level “Evasion”
Complete the level “Power”
Complete the level “Spirit”
Complete the level “Ambush”
Complete all levels in the entire game over several playthroughs
Lose a campaign
End the campaign and drive away over the mountains
End the campaign and walk home over the mountains
End the campaign and get surrounded and killed by vengeful enemies
End the campaign and get surrounded and killed by angry civilians
Experience all possible endings in the game
Conner rejects Avery’s advances
Wood and Hailey find the dog
Avery finds out about Wood’s fling
King and Sherman have a confrontation
Eat Izkor’s stew
Complete the campaign and never buy anything from Izkor’s shop
Own more than 100 salvage
Get your squad killed in Ambush!
Kill all enemies in the ambush in the level Ambush!