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Published on Jul 13, 2011
In a least-portals run for Portal 2, you can turn gravity off in one map with the crouch flying glitch and it will remain off in all future maps until you jump into another excursion funnel. This allows you to complete some chambers using fewer portals as part of a least portals run for the whole game than you could by doing each chamber individually.
sp_a4_laser_catapult can be done with 0 portals regardless of whether you enter the map with gravity off. However, it's more straightforward to enter the level with gravity off than to do it this way, so this route will not be in my least portals run for Portal 2. I'm uploading it as a stand-alone chamber.
Nothing really out of the ordinary going on here, just wall strafing and crouch flying. I will probably end up doing a stand-alone video for each of the maps that I enter with zero gravity in the full run.