Unlocked: Nov 11, 2012 3:04am
Put the can in the trash.
Unlocked: Nov 11, 2012 3:16am
Escape the apartment block raid.
Unlocked: Nov 11, 2012 3:27am
Get the crowbar.
Unlocked: Nov 11, 2012 3:40am
Kill five barnacles with one barrel.
Unlocked: Nov 11, 2012 4:04am
Get the airboat.
Unlocked: Nov 11, 2012 4:43am
Get the airboat's mounted gun.
Unlocked: Nov 11, 2012 4:52am
Destroy the hunter-chopper in Half-Life 2.
Unlocked: Nov 11, 2012 10:39pm
Blast from the Past
Find the HEV Suit Charger faceplate in Eli's scrapyard.
Unlocked: Nov 11, 2012 10:40pm
Get the Gravity Gun in Black Mesa East.
Unlocked: Nov 11, 2012 11:37pm
Escort Gregori safely through the church cemetery.
Unlocked: Nov 12, 2012 2:07am
Where Cubbage Fears to Tread
Defend Little Odessa from the gunship attack.
Unlocked: Nov 13, 2012 12:07am
One Man Army
Destroy six gunships in Half-Life 2.
Unlocked: Nov 13, 2012 12:22am
Use the antlions to kill 50 enemies.
Unlocked: Nov 13, 2012 1:35am
Survive the second turret standoff in Nova Prospekt.
Unlocked: Nov 13, 2012 1:57am
Gain command of a squad of rebels in the uprising.
Unlocked: Nov 13, 2012 2:24am
Radiation Levels Detected
Get through the toxic tunnel under City 17 in Half-Life 2.
Unlocked: Nov 13, 2012 2:50am
Survive the generator plaza standoff in chapter Anticitizen One.
Unlocked: Nov 13, 2012 11:11pm
Fight the Power
Shut down the supression device by disabling its generators.
Unlocked: Nov 13, 2012 11:52pm
Survive the rooftop strider battle in the ruins of City 17.
Unlocked: Nov 14, 2012 12:56am
Destroy the Citadel's reactor core.
Break the mini-teleporter in Kleiner's lab.
Discover the hidden singing vortigaunt cave in chapter Water Hazard.
Use DOG's ball to make a basket in Eli's scrapyard.
Play through Ravenholm using only the Gravity Gun.
Kill 3 enemies using the crane.
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.
Kill an enemy with a toilet.
Kill all of the snipers in City 17.
Disintegrate 15 soldiers by throwing them into a Combine ball field.
Find all lambda caches in Half-Life 2.
Kill five enemies with a Manhack.