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