Need your help! One handed games

you could masturbate.

FreeCell

Well, Mother 2 (Earthounb) on SNES can be played with one hand.

fortix and fortix 2

Probably Civilization V or Magic the Gathering, though with mouse and not keyboard.

Play Toki Tori.

Screw that plaster and just use your right hand as well! It happened to me and my hand is A-ok!

• edit: I'd put my money on Rogue Legacy. That or a broken plaster

civ is probably a good choice.

Need for Speed - Hot Pursuit 2010, though you'll need a finger from the busted hand to use Nitro or power-ups. In fact many older arcade racers (Juiced 2 - HIN and all NFSs before Pro Street) played just fine on keyboard. Also get an ambidextrous mouse and play turn-based stuff like XCOM-Enemy Unknown or Civilisation or pretty much any management sim/game (nothing RTS though). In fact anything that's not realtime and will wait for input would work. Point and Click adventures.

You should be able to play most racing games if you're into that, other then that you could play some point and click game, since it doesn't take extremely good reaction time, i don't think you would be able to play the walking dead or the wolf among us, those do require quick response. I'd recommend Deponia or Monkey island as far as point and click are concerned

Cthulhu Saves The World

Super Hexagon

Games that you'll only use the keyboard, mainly wasd.
Super Hexagon (Also available free online. Just google Hexagon game), Limbo, Super Meat boy (maybe?).

Won't mouse only games work as well?

Anyway, Pirates is fun game and can be played one hand on numpad.

3D SexVilla

Sorry, that was rather evil. Take Red Alert 2 and Yuri's Revenge instead, you'll be set for ages with those two.

binding of isaac only needs WASD and arrow keys you can try it out i love the game

(Almost?) every Point and Click Adventure also Tetrobot and Co..

Time to break out the point & click adventures, or turn-based strategy as others pointed out.
Also, English Country Tune is a nice and fiendish puzzler that can be controlled with one hand (as far as I got at least)

Ragdoll Masters.
Great game :P
Clicky

Robot Unicorn attack 3

Ys I and II
EDGE
Jamestown, but I'm not sure if you can set it to WSAD. If it can't, you may try playing on a pad one handed

Games from Steam: Little Inferno, World Of Goo, Angry Birds Space, Analogue: A Hate Story, Audiosurf, Dungeons Of Dredmor, Legend Of Grimrock, Machinarium, Osmos, Plants VS Zombies, Civilization 5, Defcon, Splice, ...

Games from the distros repo: Battle For Wesnoth, Frozen-Bubble, FreeDink, KsirK, The Mana World, ...

Games from other sources: Wakfu, Dofus, Cookie Clicker, Angry Birds (series), Cut The Rope, ...

Black & White :D

Thanks to all of you, these games will probably keep me busy for the next 2-3 weeks while waiting for my hand to heal
Love each and every one of you <3(but that might be the oxycodone)