Portal Pro I remember being great. So good that Portal 2 was a disappointment for me when it landed.

I needed to cheat on a few solutions, iirc, too; not because they’re badly designed, just because I couldn’t wrap my head around the solution.

It should be noted that a couple of the portal solutions need reasonably quick portal placement, so I don’t think it would be as good without KB+mouse. It took me a few tries to nail one of the techniques.