So you've found the secret passage eh? In case you aren't sure what you clicked on to get here, the secret passages are between Areas 14-17 and Areas 15-18. In order to access these passages, you must interrogate a prisoner in Neutral Zone 17. Don't kill him, but get close enough to make him uncomfortable and he'll spill his guts. The passages will then appear on the map screen. Both secret passages are identical, and you will face a horde of soldiers as well as 2 enemy bionic commandos. Each will swing his arm around to protect himself. At the end you will find the elusive helmet which deflects enemy bullets rather well. The helmet is worth picking up so make sure you play through one of the secret passageways.
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