One-handed gaming?

[superluser]

When I first read the title, "You creepy, sick fuck" sifted through my head

I do admit that every time I write about this issue, I think about how the subject will appear to other people.

Maybe get a mouse with several buttons and map the buttons to the different walk keys?

Maybe. My mouse has left/right scrollwheel tilt functions that Penumbra can't pick up, so I'd need to make sure that the mouse actually worked with Penumbra before buying something that has fifteen useless buttons. Besides, I really don't want to wind up with a WarMouse. It just looks un-fun, and the list price of 80 bucks is definitely un-fun for getting past one or two tricky puzzles in a game.

I actually have the same trouble in Half-Life, but at least in Half-Life, I can slow down the timescale for the game, and that usually makes the problems solvable.