I work in the games industry, (one of the big ones) they do a lot of visa and move people all over the place, have their own immigration attorneys etc - so I've basically left it to them to drive the whole thing.
Because I've written some publications and done some stuff that was recognised by the industry (won an award and some other stuff) combined with me having 20 years experience in a very niche area, it makes getting an O1 quite doable.
To get an O1, they make it sound like you need to be like a brain surgeon, olympic athlete or film star to quality - in reality, it can apply to absolutely anybody who's needed and has lawyers who can make that argument for you. Now I don't have it yet - I might not get it, but I'm being told by immigration experts that I should have no problem...
Hopefully