Final Portal 2 Videos released by Valve; feels gelly

Valve has released the final two parts of their Portal 2 video extravaganza. And now we see that things will be quite messy this time around with the Propulsion and Repulsion gel. You can see everything below in these videos and boy are they quite complicated. Also the second video contains video of all the various additions working with one another. Plus we see some deadly spiked walls of doom sl...

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