This page contains The Orange Box Unlockables for PC called "Secret Achievements" and has been posted or updated on Feb 21, 2010 by remus317.
- Developer: Valve Software
- Publisher: Ea Games
- Genre: Action Shooter First-Person
- Release: Oct 10, 2007
- ESRB: Mature
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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