Portal 2 E3 demo parts 4 and 5

A new set of gameplay videos show off yet another two puzzle elements that Valve’s come up with for Portal 2, both hazardous — that’s hazardous to both the player and the turrets then — in their own way; the thermal discouragement beam and pneumatic diversity vent.

They join excursion funnels and faith plates. And Wheatley.

The final two parts in the seven-part series will be released tomorrow.

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