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23 of 23 (100%) achievements earned:
Personal Achievements
 

Acid Reflex

Kill an acid antlion worker.
Unlocked 29 Oct, 2014 @ 7:46am

Get Some Grub

Squish every antlion grub in Episode Two.
Unlocked 17 Nov @ 7:33am

Piñata Party

Find and break every web cache in Episode Two.
Unlocked 17 Nov @ 7:23am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 6 Feb, 2015 @ 3:54am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 6 Feb, 2015 @ 5:21am

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 17 Nov @ 4:49am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 6 Feb, 2015 @ 6:18am

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.
Unlocked 17 Nov @ 7:59am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 6 Feb, 2015 @ 7:16am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 29 Jul, 2015 @ 1:11pm

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 6 Feb, 2015 @ 8:04am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 6 Feb, 2015 @ 7:25am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 6 Feb, 2015 @ 7:47am

Little Rocket Man

Send the garden gnome into space.
Unlocked 29 Jul, 2015 @ 1:26pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 6 Feb, 2015 @ 8:25am

Neighborhood Watch

Save all buildings outside the missile silo from destruction.
Unlocked 17 Nov @ 5:39am

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 6 Feb, 2015 @ 9:15am

Payback

Kill a Hunter with its own flechettes.
Unlocked 29 Jul, 2015 @ 1:02pm

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 28 Jul, 2015 @ 4:35am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 6 Feb, 2015 @ 3:46am

Hot Potat0wned

Kill a Combine soldier with his own grenade.
Unlocked 17 Nov @ 7:48am

Grave Robber

Steal a Zombine's grenade.
Unlocked 6 Feb, 2015 @ 6:38am

Gnome Alone

If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space. If you did not also receive the achievement 'Manufacturing Ascent', Newell has abandoned his plans to shoot Noam Chomsky into space.
Unlocked 9 Mar, 2023 @ 9:32am