I know that many of the achievements on the achievements page are "broken", but what are the "In-game, Mod, and Lua" tests some of them mention? If there is a test I can take to get an achievement, I'll take it!
These were given out manually back when there was a thing called "Unibash". It doesn't really matter now, because Unibash was dissolved and there are no more tests. I'm not sure what will happen to those achievements in the future, but they can't be earned now.