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No, angle of penetration matters in both games. The only online article we could find covering this suggests that the angle matters in Portal 2, but did not in Portal 1, but after doing science, we can clearly demonstrate that the article's wrong - entry angle matters in both games. Since you asked for undeniable proof, the following videos show you this ...


GladOS explains in Portal 2 that testing gives the AI an euphoric feeling. So at least the robots do testing as an end to its own. The humans were actually trying to do science and develop products (or something...)


Salt: Aperture Science is located in a re-purposed Michigan salt mine. Asbestos: "All these testing spheres are made out of asbestos. Keeps out the rats." - Cave Johnson Curtains: Aperture Science started out as Aperture Fixtures, a company that made shower curtains for all branches of the military except the navy.


The other answers haven't completely addressed these two points, which I'll do here: Cave Johnson says that the repulsion gel does not interact well with the human skeleton, but Chell gets covered in it and appears to be fine. Cave Johnson is a funny guy, he uses lots of euphemisms that show his callous disregard for human safety in his experiments. Here's ...


Any other things you might think of. There are other reasons for playing Portal 1 before 2 that are not really detailed in the other answers. Portal 1 is a very short game - short enough to even consider starting & finishing Portal 1 in the same day before making a start on Portal 2 The majority of Portal 1 is arguably a tutorial (made of numerous ...

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