The Orange Box achievements

The Orange Box

4.3 from 11708 votes

There are 99 The Orange Box achievements worth 2,417 (1,000)

144,278 tracked gamers have this game, 2,603 have completed it (1.80%)

Achievement Details

Secret Achievement in The Orange Box

Secret Achievement9 (5)

Continue playing to unlock this achievement. (Secret)

  • Unlocked by 46,580 tracked gamers (32% - TA Ratio = 1.76) 144,720  

Achievement Guide for Secret Achievement

55,922 (35,787)
Achievement won on 16 Jan 09
TA Score for this game: 1,271
Posted on 16 January 09 at 10:32, Edited on 16 January 09 at 11:24
This solution has 30 positive votes and 0 negative votes. Please log in to vote.
This is apparently story related but for some reason I missed it in my first play though...
In the Ep2 Chapter "Under the rader", you will need to sneak through a junkyard to get the combine cannon. When you get inside the shed where the cannon is controlled, go to the thing on the wall that's controlling the cannon, open it up and drop a grenade in it to destroy it.
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