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Half-Life 2: Episode One
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Secret Achievements (Show)
Half-Life 2: Episode One achievements
Use flares to light 15 zombies on fire.
Watch Your Head!
Make it to the bottom of the Citadel's main elevator shaft in one piece.
Kill an Elite Soldier with his own energy ball.
The One Free Bullet
Finish the game firing exactly one bullet. Grenade, crowbar, rocket, and Gravity Gun kills are okay!
Contain the Citadel core without killing any stalkers.
Help Alyx snipe 30 enemies in Episode One.
Escape From City 17
Escape City 17 with Alyx.
Survive long enough to get on the parking garage elevator.
Contain the Citadel core.
Kill five enemies with the same energy ball.
Don't let any citizens die when escorting them to the escape train.
Use the cars to squash 15 antlions in Episode One.
Destroy the gunship in the hospital attic.