A common workaround for fighting games where you stream your desktop to a friend to simulate "local" couch co-op over the internet.

As of my current data, there is no specific "Limited Edition Multiplayer" repack for this title listed on her official library. Alternative Ways to Play

While FitGirl is a popular source for compressed game installers, it is important to ensure you are using the correct official domain to avoid malware. Many "repack" sites use the names of well-known crackers like FitGirl or DODI but are actually clones or malicious mirrors. Official Source Check

If a FitGirl version doesn't exist, you might check other trusted repackers like DODI or scene groups via CS.RIN.RU , which is the primary forum for steam underground information. A Note on Multiplayer