Hotline Miami and Hotline Miami 2.
Specifically 2.
You should be able to finish it in one weekend, both games.
https://youtu.be/t-olf3xtixU?si=5uYYKjvwHOSBhpxz
Even if you aren't bullshiting, once you are bed ridden in pain with the end in the horizon, the least i want you OP is to be scared of what happens next.
I hope that you manage to overcome this, and get yourself a few years more to enjoy some things.