There are 19 achievements for the Xbox 360, six of which are secret, worth 210 . There are also six achievements that can be obtained here or the other Half-Life games in The Orange Box. There are 22 achievements for Steam.
|Acid Reflex||Kill an acid antlion worker.||5|
|Get Some Grub||Squish every antlion grub in Episode Two.
Note: Loss of internet connection may interfere with this achievement.
|Piñata Party||Find and break every web cache in Episode Two.||5|
|Into the Breach||Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.||5|
|Hit and Run||Run over 20 enemies with the car in Episode Two.||5|
|Puttin' on a Clinic||Defeat the chopper in Episode Two without any misses.||15|
|Cache Checker||Find every radar cache in chapter Under the Radar.||10|
|Gordon Propelled Rocket||Unlock the rocket launcher lambda cache in chapter Under the Radar.||5|
|Pedal to the Metal||Beat DOG in a race to the White Forest base.||5|
|Little Rocket Man||Send the garden gnome into space.||30|
|Neighborhood Watch||Save all buildings outside the missile silo from destruction.||35|
|Payback||Kill a Hunter with its own flechettes.||10|
|Grave Robber||Steal a Zombine's grenade.||5|
Any Half-Life 2 game
These six achievements can be performed on Half-Life 2, Episode One or Episode Two and are worth 40 on The Orange Box. For Steam, only Bone Breaker, Deadly Harvest and Hot Potat0wned can be obtained in Episode Two.