I just tried to unbind w and bind it again via console and it works completely fine now. It doesn't change the gravity anymore and it's not in an accelerated speed. But now it seems that I have to do this everytime I open Portal.
bind w
didn't show anything which makes me think it's hardcoded into the game somehow. But I'm happy I found the solution. Thanks for trying to help aswell! :)
Is this happening to anyone else? Every time I press W to walk forwards, the sv_gravity automatically changes to 300, and even if I change it back to 600, the physics just break. (That is, objects such as cubes, cameras and etc. just fall 2x faster and trying to launch myself from portals is just impossible). Trying to avoid pressing W doesn't even work, because the whole game is already at low gravity. I tried reinstalling the game, to no avail. Unbinding and binding W seems to work, but as stated before, the game is already at low gravity (even at 600). This also happens to any mod I play and I have yet to test it on source unpack but it's highly likely to happen on it too. My suspicions are that this seems to have started after I downloaded a mod that is installed by replacing the files from the mod to the game and not just putting it on sourcemods but I misplaced the files and had to reinstall the game and this has been happening ever since. Does anyone have the solution to this?