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Portal Walkthrough Boss Fight

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It's time to confront Glados. Wait until she drops the purple core.

Set up portals between the incinerator and the button. Press the button and throw the purple core into it.

Use portals to line up the rocket turret and trick it to shoot Glados, another core will fall out.

Grab this yellow core and burn it like the first. Line up the rocket turret and hit her again.

The third core is up here, grab it, burn it, hit her again.

This is the last core. Fling yourself to grab it, and throw it in the incinerator like all the rest.

Congratulations! Glados is beaten and you've finished Portal!