Link:
https://www.roblox.com/games/4595863515/PortalI finished Roblox Portal Medium mode in 0:39, watch the video to see how I did it!
It's really simple to do actually, here are the steps:
Shoot 2 portals the platform that's shown in the video.
Once you get it right, turn around and find another platform (also in the video)
Shoot to that, and then turn around again and shoot to the other platform.
After that, shoot to the diagonal platform where the medium mode thing is.
Drop down to the beginning of the level while keeping the portals on.
Shoot a portal to bring you to the end of the level and drop down to get enough velocity.
Done!
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https://www.youtube.com/watch?v=Z5VsusQxI-w