Secondary Silo Secured achievement in The Orange Box

Secondary Silo Secured

Secure the launch doors on missile silo 2.

Secondary Silo Secured0
1 guideOffline Game Mode - These achievements require play in game modes that do not necessitate a connection to any online services.Single Player - These achievements can be obtained by a single player.Main Storyline - These achievements are gained automatically by progressing through the main game modes.

How to unlock the Secondary Silo Secured achievement

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    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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