Tunnel Areas

[a_mirabito]

I've gotten the helmet in the tunnel from 15-18. Does anyone know if there is anything in tunnel 14-17? I went through the door at the end, but nothing happened. Havent found any items yet. I've noticed the blue blocks, and have hit them with the upgraded bazooka, but i'm still lost.

And I've still got no clue what the purple matrix does.

[Wolf X]

I didn't get anything there either. I hit every blue block I could find, maybe there's one somewhere I didn't notice.

[a_mirabito]

found it on another forum: hitting all 5 blocks makes another moving platform under the exit door. you have to swing off that to get the secret dossier.

[Ayepecks]

Does anyone have any tips for getting the helmet on that tunnels? It's so freaking annoying.

[Polygon Pirate]

I've gotten the helmet in the tunnel from 15-18.

I too have the helmet from 15-18 but the tunnel seems to go further in, past some really hard platforms and spike areas. Does anyone know if there is anything else to grab in secret tunnel 15-18 apart from the helmet???

[a_mirabito]

i'm 99.9% sure past the helmet there's only the exit; my database seems completed for all of the items. the tunnels (and the challenge rooms) make me wish BC had the same rewind function as Braid.

[Nitramuse]

Once you've grabbed the Helmet and Secret Files, you can call for extraction. You won't lose the items.

Also, the Secret Files are located in tunnel 14-17, past the exit. You'll have to swing to a moving platform. Just hit the 5 blocks (much easier if you have the Rocket Launcher upgrade), and you're ready to go. It's just about trial and error, really.

[Krilekk]

I found the upgraded vector cannon to be best suited for the job. To the person who only sees four blue switches:

1st one right above the moving platform. From there you swing three times to a stationary platform, the 2nd switch is to the right. The grapple up to the moving platform above you, swing to the right and up, you should see the 3rd switch above you. From there swing to the right and onto the moving platform, the 4th switch is on the left side of the shaft. Swing to the right, up and onto the moving platform in the middle (exact timing required). Let it move you to the right and you should see switch number 5 in the middle of the lower platform and the one you're on (I missed that switch propably a dozen times, just didn't recognize it as a switch). Once activate stay on your platform, as soon as you're moving to the right again attach to the bottom and swing to the right, the secret platform should be just in reach. Don't bother to get on top of it, you have to swing under it to get the secret dossier anyway.