Propulsion Gel is a video which was released by Valve on July 1, 2010 in order to promote Portal 2. The video provides a short segment of gameplay footage in which Propulsion Gel is used in order to successfully complete a Test Chamber. The footage is followed by some additional in-game footage along with a statement from GLaDOS.
"Propulsion Gel" Video Transcript
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| GLaDOS: Do you know the biggest lesson I learned from what you did?
We're a lot alike, you and I. You tested me. I tested you. You killed me. I-- Oh, no, wait. I guess I HAVEN'T killed you yet. Well. Food for thought. |