Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Commandos	Finish mission "What A Job!" on Hard difficulty.
Defender	Finish mission "Gatecrashers" on Hard difficulty.
Demoman	Finish mission "On the Trail of Uncle Ho" on Easy difficulty.
Ghost	Finish mission "Bon Voyage to Cambodia" on Normal difficulty.
King of the Crossing	Finish mission "Bridge on the River Mekong" on Hard difficulty.
Master of Disguise	Finish mission "Bon Voyage to Cambodia" on Hard difficulty.
Master of Sap	Finish mission "On the Trail of Uncle Ho" on Hard difficulty.
Medal for Combat Merits	Finish mission "In the Line of Fire" on any difficulty.
Medal For Valor	Finish mission "Long Way Home" on any difficulty.
Napoleon	Finish mission "Die Hard Attack" on Hard difficulty.
Patrolman	Finish mission "What A Job!" on Easy difficulty.
Peacemaker	Finish mission "What A Job!" on any difficulty with minimal losses among civilians.
Ranger	Finish mission "What A Job!" on Normal difficulty.
Redeemer	Finish mission "Long Way Home" on Hard difficulty.
Rookie	Finish mission "Vietnamese Connection" on Easy difficulty.
Saboteur	Finish mission "Happy Tet Day" on Hard difficulty.
Sapper	Finish mission "On the Trail of Uncle Ho" on Normal difficulty.
Shadow	Finish mission "Bon Voyage to Cambodia" on Easy difficulty.
Soldier	Finish mission "Vietnamese Connection" on Normal difficulty.
Soldier of fortune	Finish the game on any difficulty.
Trial by fire	Finish mission "Until the trouble troubles you" on any difficulty.
Veteran	Finish mission "Vietnamese Connection" on Hard difficulty.