Hey man, I hope you’ll recover quickly. Free climbing is nothing I’d ever have the balls to do, so respect for that!
I share your view on AC Rebellion, but I kinda stopped playing it, since I’m not really a mobile gamer at all (except Pokémon Go and Monster Super League). Maybe I’ll come back to it though, it was a lot of fun, and I like the AC franchise.
But only aving one hand free and not being able to sit really limits yours gaming capabilities, that must suck so hard…
Trying to think of one-handed games, there are some turn-based strategy games that might help you pass the time, especially the Paradox library on PC. My brother and I collectively spent about 2500 hours in Crusader Kings 2, Europa Universalis 4, Hearts of Iron 4 and Victoria 2, so how about those? Also, the Heroes of Might and Magic games are pretty great (well 3 and 5 are).
On mobile, there’s Yu-Gi-Oh! Duel Links that’s pretty fun to get into. I never played the card game before, but sunk quite a few hours into the mobile version a while ago. Also Pocket Mortys, Fallout Shelter and Alto’s Journey/Odyssey are pretty fun and easily controlled with one hand.
I hope I could help, get well soon!