The Orange Box achievements

The Orange Box

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There are 99 The Orange Box achievements worth 2,405 (1,000)

142,554 tracked gamers have this game, 2,607 have completed it (1.83%)

Achievement Details

Secret Achievement in The Orange Box

Secret Achievement9 (5)

Continue playing to unlock this achievement. (Secret)

  • Unlocked by 45,108 tracked gamers (32% - TA Ratio = 1.77) 142,554  

Achievement Guide for Secret Achievement

41,337 (26,860)
Achievement won on 27 Sep 10
TA Score for this game: 823
Posted on 28 January 10 at 06:58
This solution has 21 positive votes and 0 negative votes. Please log in to vote.
When you have FINALLY reached the white forest base after a while you will be told to go and check the silo doors on silo 2. THe combine attack around half way through this excursion an you now have to rush to sucure the silo doors and prevent any more combine from flooding in. Once you have gotten to the top of missile silo 2 and activated the silo doors you'll get the achievement. This is story related, so if you just play through episode 2 you'll get it.
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