I’d been on the microblogging side of Fedi for a while and was aware there was a federated reddit-like, but my initial impression of it was that it’s a long way from getting enough of a userbase to sustain the kind of niche hobby/fandom communities I used reddit for.
But once reddit’s API scandal happened, I dropped it and decided to check out the alternative. Still feel like it isn’t really there yet, but eh, I’m here anyway 'cause I’m not going back.
Crypt of the NecroDancer.
There are three big challenge characters in the base game:
Once you have beaten these three challenge characters, plus the other six easier ones, your next task is All Chars Mode. Beat the game nine times in a row, once with each character. If you die, you must start the whole marathon over.
Beating that unlocks the tenth character, Coda. Coda combines the restrictions of Aria, Monk, and Bolt all at once.
And if you can do that, the final achievement is Lowest of the Low, which requires you to beat All Chars Mode without collecting any items.
The DLC adds a few more hard characters, and another achievement for an extended 13 Character Mode, but they aren’t considered to be as hard as Coda or Lowest of the Low. A single digit number of players have stacked the challenges for Coda low% and 13chars low%.