Here is the full list of all 24 Jagged Alliance Flashback achievements.
Heal 100 mercenaries in doctor mode
Destroy 100 environment pieces
Heal 50 mercenaries in doctor mode
Train 75 militia squads
Hire 50 Mercenaries
Use 50 bandages
Destroy 50 environment pieces
Use 25 bandages
Kill the prince and complete the game
Find a way to Angetta
Kill 500 enemies
Train 25 militia squads
Hire 15 Mercenaries
Complete all side missions
Complete a side mission
Kill 100 Enemies
Use 5 bandages
Destroy 10 environment pieces
Hire 5 Mercenaries
Train 5 militia squads
Heal 5 mercenaries in doctor mode
Complete the Spice questline
Kill 25 enemies
Complete the first mission