Here is the full list of all 55 Trapped Dead: Lockdown achievements.
Finish the game with the Marshal on the Nightmare difficulty
Finish the game with the Exorcist on Nightmare difficulty
Finish the game with the Marine on Normal difficulty
Finish the game with the Marshal on Normal difficulty
Finish the game with the Exorcist on Normal difficulty
Finish the game with the Butcher on Normal difficulty
Finish the game with the Marine on Hard difficulty
Finish the game with the Butcher on Nightmare difficulty
Finish the game with the Assassin on Normal difficulty
Collect 1,000,000 cash
Finish the game with the Assassin on Hard difficulty
Finish the game with the Marine on Easy difficulty
Finish the game with the Marshal on Easy difficulty
Finish the game with the Exorcist on Easy difficulty
Finish the game with the Butcher on Easy difficulty
Finish the game with the Assassin on Easy difficulty
Finish the game with the Marine on Nightmare difficulty
Finish the game with the Assassin on Nightmare difficulty
Finish the game with the Marshal on Hard difficulty
Run over 50 zombies with a car
Test Driver
Clear West Commercial District of all enemies
Clear the Sewers of all enemies
Clear the Junkyard of all enemies
Finish the game with the Exorcist on Hard difficulty
Clear the Old Church and Cemetery of all enemies
Defeat 150 enemies using the Sharpen Skill
Clear East Commercial District of all enemies
Kill 50 enemies with Ranged Weapons
Clear Main Street of all enemies
Get killed on Church Street
Finish the game with the Butcher on Hard difficulty
Clear the Military Base of all enemies
Kill an enemy of every type
Reach Level 30
Clear the Caves of all enemies
Clear the Forest of all enemies
Clear the Rooftops of all enemies
Clear the Downtown Area of all enemies
Reach Level 25
Clear the Factory of all enemies
Clear the Hospital of all enemies
Reach Level 20
Eat 100 food items
Clear the Riverside of all enemies
Clear the Suburbs of all enemies
Reach Level 15
Clear the Train Yard of all enemies.
Reach Level 10
Destroy 50 breakable objects
Clear the Prison of all enemies
Buy an item from a Trader
Kill 50 enemies using Melee Weapons
Reach Level 5
Clear Church Street of all enemies