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