Mortal Kombat vs. DC Universe was never officially released for PC. It was developed by Midway Games and released in 2008 exclusively for the and Xbox 360 consoles.
Because there is no native PC port, players use emulators to run the console files:
If you decide to go the emulation route, you must provide your own game files from a physical disc you own. "Free download" sites are notorious for viruses, so always use caution and stay on reputable community forums for help. or Injustice 2
Because of this, any website claiming to offer a "free PC download" for the game is likely providing either a console file (ROM/ISO) that requires specialized software to run or, more dangerously, . The Story of Why It’s Not on PC
The game is playable on handhelds like the Steam Deck using the Xenia Canary or RPCS3 emulators. 🛡️ Important Safety Note