The Orange Box achievements

The Orange Box

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There are a maximum of 99 The Orange Box achievements worth 2,350 (1,000)

126,419 tracked gamers have this game, 2,471 have completed it (1.95%)

Achievement Details

Secret Achievement in The Orange Box

Secret Achievement9 (5)

Continue playing to unlock this secret achievement. (Secret)

  • Unlocked by 41,295 tracked gamers (33% - TA Ratio = 1.74) 126,419  

Achievement Guide for Secondary Silo Secured

40,470 (26,860)
Achievement won on 27 Sep 10
TA Score for this game: 809
Posted on 28 January 10 at 06:58
This solution has 20 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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