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

Acid Reflex

Kill an acid antlion worker.
Unlocked 14 Mar, 2020 @ 10:37am

Get Some Grub

Squish every antlion grub in Episode Two.
Unlocked 14 Mar, 2020 @ 3:10pm

Piñata Party

Find and break every web cache in Episode Two.
Unlocked 14 Mar, 2020 @ 2:54pm

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 14 Mar, 2020 @ 11:07am

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 14 Mar, 2020 @ 3:13pm

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 15 Mar, 2020 @ 7:03pm

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 15 Mar, 2020 @ 3:05pm

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.
Unlocked 15 Mar, 2020 @ 3:35pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 15 Mar, 2020 @ 5:42pm

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 15 Mar, 2020 @ 6:13pm

Pedal to the Metal

Beat DOG in a race to the White Forest base.
Unlocked 15 Mar, 2020 @ 6:20pm

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 15 Mar, 2020 @ 5:53pm

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 15 Mar, 2020 @ 6:07pm

Little Rocket Man

Send the garden gnome into space.
Unlocked 15 Mar, 2020 @ 6:30pm

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 15 Mar, 2020 @ 6:42pm

Neighborhood Watch

Save all buildings outside the missile silo from destruction.
Unlocked 15 Mar, 2020 @ 7:05pm

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 15 Mar, 2020 @ 7:05pm

Payback

Kill a Hunter with its own flechettes.
Unlocked 15 Mar, 2020 @ 3:04pm

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 15 Mar, 2020 @ 5:49pm

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 14 Mar, 2020 @ 10:57am

Hot Potat0wned

Kill a Combine soldier with his own grenade.
Unlocked 15 Mar, 2020 @ 7:28pm

Grave Robber

Steal a Zombine's grenade.
Unlocked 14 Mar, 2020 @ 2:17pm

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 21 Nov, 2020 @ 6:17pm