Half-Life 2: Episode Two Achievements Full list of all 23 Half-Life 2: Episode Two achievements. It takes around 6-8 hours to unlock all of the achievements in the base game on Windows.The base game contains 22 achievements, and there are 2 DLC packs containing 1 achievements.Filter Achievement View View Image viewList view Sort by Won first then by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc DLC Packs Group DLC packs together in list DLC Filter AllOwnedNone Flag Filter All None 23 Offline Mode 23 Single Player 6 Main Storyline 4 Collectable 1 Missable 1 Cumulative + Link flagsOR joinAND join Achievements without these flags What are achievement flags? Click to find outApply AllWonNot won Base Base Game (Excludes DLC) 288 22 4.5412,7983,279 (26%)6-8h Puttin' On a ClinicDefeat the chopper in Episode Two without any misses. 01 July 2018 - Add a guideNeighborhood WatchSave all buildings outside the missile silo from destruction. 01 July 2018 - 1 guideLittle Rocket ManSend the garden gnome into space. 01 July 2018 - Add a guideGet Some GrubSquish every antlion grub in Episode Two. 01 July 2018 - 1 guidePiñata PartyFind and break every web cache in Episode Two. 01 July 2018 - Add a guideDefense of the ArmamentSave the missile silo from the Combine offensive. 03 December 2010 - Add a guideSecondary Silo SecuredSecure the launch doors on missile silo 2. 03 December 2010 - Add a guideHot Potat0wnedKill a Combine soldier with his own grenade. 02 December 2010 - Add a guidePedal to the MetalBeat DOG in a race to the White Forest base. 02 December 2010 - Add a guideCache CheckerFind every radar cache in chapter Under The Radar. 02 December 2010 - Add a guideQuiet Mountain GetawaySurvive the ambush at White Forest Inn. 02 December 2010 - Add a guidePaybackKill a Hunter with its own flechettes. 02 December 2010 - Add a guideGordon Propelled RocketUnlock the rocket launcher lambda cache in chapter Under The Radar. 02 December 2010 - Add a guideHit and RunRun over 20 enemies with the car in Episode Two. 02 December 2010 - Add a guideGunishment!Destroy the Combine Autogun in the junkyard. 02 December 2010 - Add a guideMeet the HuntersSurvive the Hunter ambush with Alyx. 02 December 2010 - Add a guideBone BreakerKill 30 enemies with thrown physics objects. 02 December 2010 - Add a guideGrave RobberSteal a Zombine's grenade. 02 December 2010 - 1 guideTwoferDefeat both antlion guards outside the White Forest. 02 December 2010 - Add a guideInto the BreachHelp Griggs and Sheckley hold off the antlion invasion inside the mine shaft. 01 December 2010 - 1 guideDeadly HarvestKill an enemy by planting a hopper mine. 01 December 2010 - 1 guideAcid ReflexKill an acid antlion worker. 01 December 2010 - 1 guide Update Gnome Chompski 15 10 1 3.605,3015,301 (100%)0-1h Gnome AloneIf 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. 20 November 2020 - 1 guide