Here is the full list of all 38 Freeman: Guerrilla Warfare achievements.
Construct 50 buildings
Land 1000 headshots
Recruit all available companions
Plunder 50 times
Kill 1000 enemies in total
Fail at stealing 50 times
Die 50 times
Steal 50 times
Reach 500 Reputation
Forge 5 alliances with other nations
Accept volunteer troops 5 times
Reach 300 Reputation
Forge 3 alliances with other nations
Win 50 battles
Throw 200 grenades
Defend your city 5 times
Kill 100 enemies with pistol
Kill 100 enemies with submachine gun
Kill 100 enemies with shotgun
Lose 50 battles
Possess 5,000,000 Zolties
Fully upgrade your Stealing skill
Fully upgrade your Agility skill
Have -200 Reputation
Have -100 Reputation
Fully upgrade your Medicine skill
Fully upgrade your Intelligence skill
Reach Level 30
Possess 1,000,000 Zolties
Kill 100 enemies with grenades
Land 100 headshots
Possess 100,000 Zolties
Win 10 battles by yourself
Reach Level 10
Kill 100 enemies in total
Reach 50 Reputation
Reach Level 5
Have -30 Reputation