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22 of 23 (96%) achievements earned:
Personal Achievements
 

Acid Reflex

Kill an acid antlion worker.
Unlocked 5 Jun, 2011 @ 9:42am

Get Some Grub

Squish every antlion grub in Episode Two.
Unlocked 18 Mar, 2020 @ 10:00am

Piñata Party

Find and break every web cache in Episode Two.
Unlocked 16 Aug, 2018 @ 6:05pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 7 Jun, 2011 @ 11:42am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 9 Jun, 2011 @ 10:41am

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 19 Mar, 2020 @ 11:04am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 21 Jul, 2011 @ 4:04am

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.
Unlocked 17 Aug, 2018 @ 8:33am

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 21 Jul, 2011 @ 3:53am

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 25 Feb, 2016 @ 10:26am

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 25 Feb, 2016 @ 10:31am

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 21 Jul, 2011 @ 6:42am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 5 Dec, 2012 @ 2:24am

Little Rocket Man

Send the garden gnome into space.
Unlocked 21 May @ 2:38pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 21 Jul, 2011 @ 7:10am

Neighborhood Watch

Save all buildings outside the missile silo from destruction.
Unlocked 28 Feb, 2016 @ 12:05pm

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 28 Feb, 2016 @ 12:05pm

Payback

Kill a Hunter with its own flechettes.
Unlocked 12 Jan, 2014 @ 6:46am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 11 Jun, 2017 @ 5:20am

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 7 Jun, 2011 @ 11:26am

Grave Robber

Steal a Zombine's grenade.
Unlocked 4 Dec, 2012 @ 2:02am

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 23 Nov, 2020 @ 3:18pm



Hot Potat0wned

Kill a Combine soldier with his own grenade.