Portal 2 demo videos wrapped up

Valve’s sent out the final two videos of the seven-part series of Portal 2‘s puzzle element introductions they’ve been doing throughout the week. Part 6, above, introduces the repulsion gel while part 7, below, the propulsion gel, both most handy in their own sticky ways.

The propulsion one’s final 30 seconds also put a tidy bow on the series by showing more of the game’s various puzzle-filled environments.

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