Unlockable How to Unlock Acid Reflex Kill an acid antlion worker. Bone Breaker Kill 30 enemies with thrown physics objects. Cache Checker Find every radar cache in chapter Under The Radar. Deadly Harvest Kill an enemy by planting a hopper mine. Defense of the Armament Save the missile silo from the Combine offensive. Get Some Grub Squish every antlion grub in Episode Two. Gordon Propelled Rocket Unlock the rocket launcher lambda cache in chapter Under The Radar. Grave Robber Steal a Zombine's grenade. Gunishment! Destroy the Combine Autogun in the junkyard. Hit and Run Run over 20 enemies with the car in Episode Two. Hot Potat0wned Kill a Combine soldier with his own grenade. Into the Breach Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft. Little Rocket Man Send the garden gnome into space. Meet the Hunters Survive the Hunter ambush with Alyx. Neighborhood Watch Save all buildings outside the missile silo from destruction. Payback Kill a Hunter with its own flechettes. Pedal to the Metal Beat DOG in a race to the White Forest base. Pin~ata Party Find and break every web cache in Episode Two. Puttin' On a Clinic Defeat the chopper in Episode Two without any misses. Quiet Mountain Getaway Survive the ambush at White Forest Inn. Secondary Silo Secured Secure the launch doors on missile silo 2. Twofer Defeat both antlion guards outside the White Forest.
Contributed By: Guard Master.
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