This page contains The Orange Box Unlockables for Xbox 360 called "Secret achievements" and has been posted or updated on Jun 25, 2009 by GafOvanny. Let us know what you think of this Unlockable by thumbs voting.
Complete one of the following achievements to collect their Xbox Gamerscore points:
|Unlockable:||How to Unlock:|
|Defense of the Armament (20 points)||Save the missile silo from the Combine offensive.|
|Defiant Achievement (5 points)||At the beginning of Half-Life 2 where the carbine cop asks you to pick up the can, pick it up and hit him with it.|
|Gunishment! (5 points)||Destroy the Combine cannon in the junkyard.|
|Hallowed Ground (5 points)||Escort Gregori safely through the church cemetery in Half-Life 2.|
|Meet the Hunters (10 points)||Survive the Hunter ambush with Alyx.|
|Quiet Mountain Getaway (10 points)||Survive the ambush at White Forest Inn.|
|Secondary Silo Secured (5 points)||Secure the launch doors on missile silo 2.|
|Singularity Collapse (25 points)||Destroy the Citadel's reactor core in Half-Life 2.|
|Submissive (5 points)||Put the can in the trash in Half-Life 2.|
|Twofer (5 points)||Defeat both antlion guards outside the White Forest.|
|Where Cubbage Fears to Tread (5 points)||Defend Little Odessa from the gunship attack in Half-Life 2.|
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