Super Meat Boy features many playable characters with unique physics and abilities. Many of them even come from other series! Name every one of these characters here.
One character is only playable via dev mode, meaning he isn't officially playable, but I wanted to include him anyway since he's the only character in the game that is not officially playable.
Sadly, many of these characters are exclusive to specific versions of the game, so some requirements might overlap.
The amount of crossovers in indie games leads me to believe that they are all planning a massive extended universe... Like seriously, it seems like there’s way more indie crossovers than any other genre.