Welcome to the club! I did the same thing with a meat slicer about 20 years ago. My thumb was flat at the tip of the nail for a long time, but it's grown back since then.

Turn based games are great for one handed, because you can take your time hitting the buttons. Maybe slay the spire, Inscryption or balatro if you haven't tried those yet.

Anything on PC with a mouse/keyboard, maybe with the spacebar remapped.

• Anything turn-based, especially mouse-driven titles. Slay the Spire, Chess, Riichi Mahjong, Balatro, etc.

• Puyo Puyo Champions has a one-handed preset in its controller options. Do note that if you want to play online, only Switch is active since that's where Japan is, I can't recommend the game on other platforms.

• Kirby Air Ride uses only one button + analog stick, and any button works, so you can use L. Would have to be left hand for the original, but the sequel coming out later this month has a detailed accessibility menu, which I bet will include right-handed settings.

• Crypt of the Necrodancer is designed to be playable with just four arrows, in case anyone wanted to play it on a DDR mat. Which also means you can play with arrow keys or WASD.

• Rhythm Doctor is actually just one button.

• Rhythm Heaven Fever uses only A and B. Rhythm Heaven DS uses only stylus. The rest of the series uses d-pad as well though, so those are less playable.

• Come to think of it, any DS game that only uses stylus.

Most visual novels should suffice if you like those. VA-11 Hall-A is great (though best if can hold a drink in the other hand)

Oh, and point-and-click adventure are usually also controllable with just a mouse.

Just about anything that is turn based. Board games ports, Roguelike games like Balatro, Slay the Spire, 9 Kings. Civilization games and Civ-likes. You can even play ttrpg ports like Baldur's Gate and Divinity but it might be a little annoying without an RPG mouse. I played a lot of Civ when my left arm was paralyzed then weirdly Wii tennis after surgery.

I'm late, game recommendations are covered, but I can give you advice for healing your thumb. I've had the tips of my thumb and a finger glued back on as well as stitches on my fingers several times.

Blood flow to the tip is important. Squeezing a stress ball or something helps. It'll also keep the skin from healing too... tightly? If that makes sense.

Keep it dry. If you need to bandage it, do it loosely and change it often. Cotton balls work really well to keep it dry as well as protect it from accidental impacts.

If the doctor didn't do a good job, trim the stitches so they don't catch on anything. If you're in America, take the stitches out yourself after 10-14 days or as soon as you can wiggle them freely. Nail clippers work really well to cut the stitch and pull it out.

If you rip a stitch, you can use a careful dab of super glue to close it. Just make sure it's clean and dry first.

If you cut through the nail, it'll grow back kinda fucked up. My nail healed in an M shape and dirt would get trapped in the middle so I put some Vaseline or something under it to keep it clean.

Last but not least, you have a small window in which fingerprint evidence may be inadmissable in a court of law. Do with this information as you will.

Point and click?

Vampire Survivors really only requires one hand, and if you use steam input to remap some buttons you can play it entirely with one hand.

For instance on the left hand side, since you navigate with the joystick, I set the d-pad to mirror the abxy buttons, and set L2 to be R1 which let's you increase the game speed after you unlock the function in game

Huniepop

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