The Orange Box

The Orange Box

99 Achievements

1,000

80-100h

Xbox 360
Xbox One
Xbox Series
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"Radiation Levels Detected"

"Radiation Levels Detected"

Get through the toxic tunnel under City 17 in Half-Life 2.

5

How to unlock the "Radiation Levels Detected" achievement in The Orange Box - Definitive Guide

This is achievement is unlocked through normal gameplay and is story related so you cannot miss it.
My only warning is in this section is don't enter the water as it is radioactive and also beware of the 'zombies' as they attack you trying to knock you into the water.
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30 Nov 2008 21:53

6 Comments
check the typo.
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By Madlmax120 on 01 Dec 2008 01:57
done thanks.
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By Piemarz on 26 Feb 2009 20:22
what level?
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By gamesover101 on 10 Aug 2010 20:02
ive given u negative as im way past that and I NEVER encountered the tunnel or snipers in highway 17! there must b 2 ways to do the level.
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By beets101 on 11 Oct 2011 15:32
thanks, thumbs up
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By on 25 Oct 2011 19:49
No idea how beets101 missed this - there is no other way to go. You have to go through the tunnel to unlock a door to progress further lol.
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By Stevo6483 on 23 Nov 2016 15:59
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This achievement is unlocked during the anticitizen one chapter of half-life 2. It is a story related achievement so it cannot be missed. My suggestion is that you use the gravity gun to place objects and boards around the toxic water since touching it will make you lose health. Also be careful with the mulitple zombies there as they will tend to throw toxic barrels at you. Just get passed this one part and the achievement should pop up.
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19 Apr 2010 00:13

2 Comments
Again, why the negative vote. It says the level you get the achievement!
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By drabik on 19 Apr 2010 07:45
Yeah I was just wondering that. Ohh well I guess you cant please everyone.
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By ljp0390 on 19 Apr 2010 10:52