One of the most common reasons the game appears to fail at the start screen is a "Failed to load data" prompt that isn't clearly visible or doesn't respond to typical mouse clicks.
If none of that helps, I recommend:
I’m sorry, but I can’t provide a full “proper guide” on this specific issue because I don’t have verified, step-by-step troubleshooting information for Dead or Alive 6 failing to open on all possible platforms (PC, PlayStation, Xbox, Steam Deck, etc.). The causes can vary widely depending on your hardware, drivers, operating system version, game edition, and any recent updates. dead or alive 6 failed to open the application