Half-Life 2: Episode Two

Defeat both antlion guards outside the White Forest.

LockedSteam

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.

LockedSteam

Save the missile silo from the Combine offensive.

LockedSteam

Survive the Hunter ambush with Alyx.

LockedSteam

Secure the launch doors on missile silo 2.

LockedSteam

Save all buildings outside the missile silo from destruction.

LockedSteam

Beat DOG in a race to the White Forest base.

LockedSteam

Unlock the rocket launcher lambda cache in chapter Under The Radar.

LockedSteam

Survive the ambush at White Forest Inn.

LockedSteam

Find and break every web cache in Episode Two.

LockedSteam

Find every radar cache in chapter Under The Radar.

LockedSteam

Squish every antlion grub in Episode Two.

LockedSteam

Defeat the chopper in Episode Two without any misses.

LockedSteam

Destroy the Combine Autogun in the junkyard.

LockedSteam

Run over 20 enemies with the car in Episode Two.

LockedSteam

Kill a Hunter with its own flechettes.

LockedSteam

Kill an acid antlion worker.

LockedSteam

Send the garden gnome into space.

LockedSteam

Steal a Zombine's grenade.

LockedSteam

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.

LockedSteam

Kill 30 enemies with thrown physics objects.

LockedSteam

Kill an enemy by planting a hopper mine.

LockedSteam

Kill a Combine soldier with his own grenade.

LockedSteam