Welcome to my Portal 2 walkthrough in 1080p HD! For best viewing quality, click the fullscreen button in the YouTube player, then select 1080p, or "original" for even better than 1080p.
We exit the last Beta Sphere, snake around some construction areas, then we enter Pump Station Gamma! This pump station pipes three gels, including a new white gel called Conversion Gel. When you coat a flat surface with this gel, it creates portalable surfaces. Very interesting! We have to figure out how to get past Crushers, whose sole purpose is to crush me. After I exit the station, I realize that I need to use mobility gel to catapult across the shaft to the exit elevator...
The next chamber reveals that GLaDOS seems to have been Cave Johnson's secretary at one point in time. Then, we use propulsion gel (orange gel) to solve the test chamber by zooming along the gel then leaping everywhere.
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