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