Wild card
For a deserving challenge, answer, or user that isn't a good fit for any of the other categories.
quintopia's Befunge-93 in Befunge-93
Interpreting Befunge 93 is already not very easy, but doing it within Befunge 93 is a behemoth in itself. This uses the existing features of befunge to simulate the program within its own playing field!
Jo King's quantum quine
Nominated by emanresu A
When I wrote this question, I didn't believe it was possible to create a program with a score of 0. It's hard to make a program that functions when any character is removed, and even harder to make a quine that stays a quine when any character is removed, let alone one that behaves in such a specific way.
Jo King's answer uses Backhand, a language which skips every few characters to make restricted-source a bit easier, and even then it's still a quite complex answer.
