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15 of 23 (65%) achievements earned:
Personal Achievements
 

Acid Reflex

Kill an acid antlion worker.
Unlocked 18 Dec, 2023 @ 5:50am

Into the Breach

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.
Unlocked 18 Dec, 2023 @ 8:28pm

Twofer

Defeat both antlion guards outside the White Forest.
Unlocked 19 Dec, 2023 @ 10:54pm

Hit and Run

Run over 20 enemies with the car in Episode Two.
Unlocked 21 Dec, 2023 @ 5:21am

Meet the Hunters

Survive the Hunter ambush with Alyx.
Unlocked 20 Dec, 2023 @ 6:56pm

Gunishment!

Destroy the Combine Autogun in the junkyard.
Unlocked 20 Dec, 2023 @ 7:31pm

Cache Checker

Find every radar cache in chapter Under The Radar.
Unlocked 22 Dec, 2023 @ 7:50pm

Gordon Propelled Rocket

Unlock the rocket launcher lambda cache in chapter Under The Radar.
Unlocked 21 Dec, 2023 @ 5:23am

Quiet Mountain Getaway

Survive the ambush at White Forest Inn.
Unlocked 21 Dec, 2023 @ 5:41am

Secondary Silo Secured

Secure the launch doors on missile silo 2.
Unlocked 22 Dec, 2023 @ 8:23pm

Defense of the Armament

Save the missile silo from the Combine offensive.
Unlocked 26 Dec, 2023 @ 7:54pm

Payback

Kill a Hunter with its own flechettes.
Unlocked 21 Dec, 2023 @ 5:40am

Bone Breaker

Kill 30 enemies with thrown physics objects.
Unlocked 19 Dec, 2023 @ 11:22pm

Deadly Harvest

Kill an enemy by planting a hopper mine.
Unlocked 18 Dec, 2023 @ 8:21pm

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 Dec, 2023 @ 8:37pm



Get Some Grub

Squish every antlion grub in Episode Two.

Piñata Party

Find and break every web cache in Episode Two.

Puttin' On a Clinic

Defeat the chopper in Episode Two without any misses.

Pedal to the Metal

Beat DOG in a race to the White Forest base.

Little Rocket Man

Send the garden gnome into space.

Neighborhood Watch

Save all buildings outside the missile silo from destruction.

Hot Potat0wned

Kill a Combine soldier with his own grenade.

Grave Robber

Steal a Zombine's grenade.