The Goggled Helmet has a low chance (~5%?) to drop in a Arc chest. So it's a matter of Random Drop. You might have to run the Arc level a few times to get it, or the other Arc items.
Note: You're better served by clearing the main floor, hoping down to the Reactor, than back up again to re-set the Arc's enemies and chests. Don't try the save and re-load farming method. It doesn't work so well.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.