I recently broke my arm and I won't be able to use it for at least a month. I was starting to play STALKER 2 but that's not going to be possible for a while.
Do you have any suggestion for one-handed PC games?
Anything turn-based and mouse-driven like Slay the Spire, Dicey Dungeons, Baba is You, Inscryption, Super Auto Pets, Mega Knockdown, chess, riichi mahjong, visual novels, etc. Or anything turn-based in general regardless of control scheme if you're alright with playing slowly.
Rhythm Doctor - A one button rhythm game.
Crypt of the Necrodancer - This game's control scheme was designed to be possible to play it on a dance pad. Which means you can also just play it with WASD or arrow keys.
I wanna shout out Puyo Puyo Champions since it actually has a one handed preset in its controller options. D-pad or ABXY to move and L1/L2 or R1/R2 to rotate. Caveat though is that the Steam version is not at all active online, I would strongly recommend getting it on Switch if you can.
I think Baba is you is better just with keyboard, it's one of the few games that allows for keyboard navigation on menus. I'm also not sure how to even move using the mouse.
Tacking Pentiment onto that. The premise may not seem super badass, but goddamn if it didn't suck me in and make me feel like I was a part of that town, extremely good game
To expand on this, Rollercoaster Tycoon 2 has a FOSS re-implementation called OpenRCT2, and it's considerably better than even the original. I'd recommend Planet Coaster, but honestly, I think the simplicity of RCT2 makes things a lot easier one-handed.
If you are able to spend the money, consider getting a flight-stick-style joystick. You can get ones that have multiple thumb buttons, one or more triggers, and you control it all with one hand,
Get a controller. I once had a broken arm, too (my dominant arm, to make things worse), but my hands worked fine so I could use my controller without any problems. Hands layed in my lap with the controller, and I learned really fast not to move my whole body to steer vehicles 😅
I had a similar situation a few years ago and I filled my gaming void with Diablo 3. I had to bind my side buttons to the abilities. Worked surprisingly well.
Also, Audiosurf, EDGE and most racing games on PC depending on how you are comfortable to play them on KB.
And if you are into adventure books of games, The Walking Dead and other creations of that studio or in that style usually need to select one of the options in dialogue and that's all.
CORRECTION: Mindustry on PC doesn't have all on-screen buttons it has on mobile, particularly pause button, so it'd need to be binded somewhere accessible. Didn't know that. So it's stupidly easier to play on Android (free) with attached mouse than on PC shm.