Level 18 is one of the harder levels in Portal, so this video will give you a quick walkthrough on how to beat it.
Portal is a essentially a 3-D puzzle game that came with The Orange Box. There are many intense levels that require strategic planning, and this is one of them. Good luck!
Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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