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So, it should take about 5:20 to 5:25 if you time it accurately (I'm assuming). By the way, in the options there is a 'portal funnel' option, which …
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To unlock Terminal Velocity, you must create 2 portals directly above and directly below you. These portals must be directly vertical to each other, or you can fall …
The terminal velocity achievement consists of falling 30,000 feet. There aren't any places in the Aperture Science Enrichment Center where you …
Otherwise, just try again and wait for a longer time before you come out of the jump. ← Terminal Velocity Achievement Guide.
I put a portal on the ceiling and a portal on the ground below it, went to dinner, came back and I was still falling and I still didnt have the …
Terminal Velocity achievement in Portal. Terminal Velocity. Fall 30,000 feet. Terminal Velocity 0. 1 guide Offline Game Mode Single Player …
Acquire the fully powered Aperture Science Handheld Portal Device. Difficulty: Story-related. How to obtain: This achievement is story related, …
For The Orange Box on the Xbox 360, a GameFAQs message board topic titled "Getting the portal achievement fall 30000 feet.".
Terminal Velocity: To get this achievement you must wait till after you have both colour portals, which you can't get before chamber 11.