Half-Life 2: Episode Two Achievement List

Acid Reflex Acid Reflex
Kill an acid antlion worker.
Get Some Grub Get Some Grub
Squish every antlion grub in Episode Two.
Piñata Party Piñata Party
Find and break every web cache in Episode Two.
Into the Breach Into the Breach
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Twofer Twofer
Defeat both antlion guards outside the White Forest.
Hit and Run Hit and Run
Run over 20 enemies with the car in Episode Two.
Meet the Hunters Meet the Hunters
Survive the Hunter ambush with Alyx.
Puttin' On a Clinic Puttin’ On a Clinic
Defeat the chopper in Episode Two without any misses.
Gunishment! Gunishment!
Destroy the Combine Autogun in the junkyard.
Cache Checker Cache Checker
Find every radar cache in chapter Under The Radar.
Pedal to the Metal Pedal to the Metal
Beat DOG in a race to the White Forest base.
Gordon Propelled Rocket Gordon Propelled Rocket
Unlock the rocket launcher lambda cache in chapter Under The Radar.
Quiet Mountain Getaway Quiet Mountain Getaway
Survive the ambush at White Forest Inn.
Little Rocket Man Little Rocket Man
Send the garden gnome into space.
Secondary Silo Secured Secondary Silo Secured
Secure the launch doors on missile silo 2.
Neighborhood Watch Neighborhood Watch
Save all buildings outside the missile silo from destruction.
Defense of the Armament Defense of the Armament
Save the missile silo from the Combine offensive.
Payback Payback
Kill a Hunter with its own flechettes.
Bone Breaker Bone Breaker
Kill 30 enemies with thrown physics objects.
Deadly Harvest Deadly Harvest
Kill an enemy by planting a hopper mine.
Hot Potat0wned Hot Potat0wned
Kill a Combine soldier with his own grenade.
Grave Robber Grave Robber
Steal a Zombine’s grenade.