Half-Life 2: Episode One Achievement List

Watch Your Head! Watch Your Head!
Make it to the bottom of the Citadel’s main elevator shaft in one piece.
Containment Containment
Contain the Citadel core.
Pacifist Pacifist
Contain the Citadel core without killing any stalkers.
Car Crusher Car Crusher
Use the cars to squash 15 antlions in Episode One.
Elevator Action Elevator Action
Survive long enough to get on the parking garage elevator.
Live Bait Live Bait
Help Alyx snipe 30 enemies in Episode One.
Attica! Attica!
Destroy the gunship in the hospital attic.
Citizen Escort Citizen Escort
Don’t let any citizens die when escorting them to the escape train.
Escape From City 17 Escape From City 17
Escape City 17 with Alyx.
The One Free Bullet The One Free Bullet
Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Conservationist Conservationist
Kill five enemies with the same energy ball.
Think Fast! Think Fast!
Kill an Elite Soldier with his own energy ball.
Zombie-que Zombie-que
Use flares to light 15 zombies on fire.