Re: how can I contact modders for Portal 1 and Portal 2?
A generally good place to find such modders would be on moddb.com, you can find a list of available mods and their makers for portal one [here] and portal 2 [here].
For the most part Portal one is combat free, combat drones not withstanding, and more akin to a puzzle game, though it hinges heavily on spacial reasoning in 3 dimensional space, such as with placement of portals, accessing and moving objects, timing, etc. There are a few potential modifications that could make it playable, but to what degree is difficult to say.
Something else to consider is that Portal 2 is also multiplayer, so perhaps you could try playing with someone who can assist in navigating.
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