This mode is strictly for local play (2 players) and does not natively support online or LAN play.
If you are using a version of the game that includes this expansion, here are some key technical points from the PCGamingWiki :
Periodic rotations of hand-picked chapters created by the community, often featuring extreme difficulty. Technical Details and Requirements Super.Meat.Boy.Race.Mode.Edition.rar
The game selects levels at random for the players to compete on.
Players can manually choose the chapters they want to race in, including the more difficult "Dark World" variants. This mode is strictly for local play (2
The is a competitive local multiplayer expansion that allows two players to race through levels simultaneously in a split-screen format. It features several gameplay variations:
Super Meat Boy is renowned for its "hard as nails" difficulty. While the Race Mode adds a competitive layer, the core gameplay remains focused on pixel-perfect wall-jumping and timing. Completing the most difficult sections, such as without dying, remains one of the hardest achievements in the game. Super Meat Boy Race Mode on Steam Players can manually choose the chapters they want
On platforms like Steam , it is often listed as a separate DLC that must be installed to enable the menu option in the main game.