Book bingo is a yearly reading challenge hosted on r/Fantasy. 

HARD MODE: For an added challenge, you can choose to do 'Hard Mode' which is the square with something added just to make it a little more difficult. You can do one, some, none, or all squares on 'Hard Mode' -- whatever you want, it's up to you! There are no additional prizes for completing Hard Modes, it's purely a self-driven challenge for those who want to do it.

HERO MODE: Review EVERY book that you read for bingo. You don't have to review it on r/Fantasy. It can be on Goodreads, Amazon, your personal blog, some other review site, wherever! Leave a review, not just ratings, even if it's just a few lines of thoughts, that counts. As with Hard Mode there is no special prize for hero mode, just the satisfaction of a job well done.