Unlocked: Nov 3, 2011 2:07pm
Submissive
Put the can in the trash.
Unlocked: Nov 3, 2011 2:17pm
Malcontent
Escape the apartment block raid.
Unlocked: Nov 3, 2011 2:30pm
Trusty Hardware
Get the crowbar.
Unlocked: Nov 5, 2011 2:30am
Barnacle Bowling
Kill five barnacles with one barrel.
Unlocked: Jan 11, 2012 10:35am
Anchor's Aweigh!
Get the airboat.
Unlocked: Feb 22, 2012 2:15pm
Heavy Weapons
Get the airboat's mounted gun.
Unlocked: Feb 22, 2012 2:32pm
Revenge!
Destroy the hunter-chopper in Half-Life 2.
Unlocked: Feb 22, 2012 2:55pm
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked: Feb 22, 2012 2:55pm
Zero-Point Energy
Get the Gravity Gun in Black Mesa East.
Unlocked: Feb 22, 2012 10:25pm
Hallowed Ground
Escort Gregori safely through the church cemetery.
Unlocked: Mar 4, 2012 5:55am
OSHA Violation
Kill 3 enemies using the crane.
Unlocked: Mar 4, 2012 5:49am
Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack.
Unlocked: Mar 4, 2012 2:29pm
One Man Army
Destroy six gunships in Half-Life 2.
Unlocked: Mar 4, 2012 10:41am
Bug Hunt
Use the antlions to kill 50 enemies.
Unlocked: Mar 5, 2012 10:58am
Warden Freeman
Survive the second turret standoff in Nova Prospekt.
Unlocked: Mar 5, 2012 11:32am
Follow Freeman
Gain command of a squad of rebels in the uprising.
Unlocked: Apr 1, 2012 11:06am
Radiation Levels Detected
Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked: Jul 26, 2012 2:16am
Plaza Defender
Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked: May 18, 2013 2:03pm
Fight the Power
Shut down the supression device by disabling its generators.
What cat?
Break the mini-teleporter in Kleiner's lab.
Vorticough
Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Two Points
Use DOG's ball to make a basket in Eli's scrapyard.
Zombie Chopper
Play through Ravenholm using only the Gravity Gun.
Targetted Advertising
Pin a soldier to the billboard in chapter Highway 17.
Keep Off the Sand!
Cross the antlion beach in chapter Sandtraps without touching the sand.
Flushed
Kill an enemy with a toilet.
Counter-Sniper
Kill all of the snipers in City 17.
Giant Killer
Survive the rooftop strider battle in the ruins of City 17.
Atomizer
Disintegrate 15 soldiers by throwing them into a Combine ball field.
Lambda Locator
Find all lambda caches in Half-Life 2.
Hack Attack!
Kill five enemies with a Manhack.
