If it wasn’t obvious, PYRO and DEMO were referring to the Team Fortress 2 classes.
My personal favorite entries were OREOS and ENTER. Neither were particularly clever but “Monochrome Sandwiches” is the sadly necessary result of a thousand years clueing the word “Oreo” that i quite liked. “Submission button” accidentally sounded like a prostate euphemism, but I think that makes the clue better.
I’m also going to coin this puzzle a “Fuckkkk Why Didn’t I Do This Last Night” puzzle. I made it in the morning before I had to do something. This is not the first and will not be the last.