Mr. Douchebag Breaks Rocks was a cancelled Your Favorite Martian flash game that was planned to be released on Ray William Johnson's website. It was going to be based on the YFM song called "Mr. Douchebag" which also was a meme, it was also going to be a massive non-linear MMORPG according to some sources. There is no footage or screenshots of this cancelled game, and all that remains is a cover of the game which is on Wayback Machine captures of the website's game section with it also being advertised as "Coming Soon!" It was cancelled at the last minute when the Coming Soon notice for the game was removed after the site rebranded, it's unknown why it was, however it's been said that it got cancelled due to tight deadlines but this has not been confirmed, the YFM Facebook account also mentions that it was almost ready implying that it was most likely finished in June 2011, before it was cancelled.
Facebook post in question