The game can work without any modifications whatsoever. However, if you start the game in gaming mode on the steam deck, it will start with a black screen.

The reason for this is that the game, by default, starts in windowed mode. The steamdeck does not support that, so this guide shows you how to set the game to fullscreen mode.

Below are the steps necessary to solve the problem:

• Switch the steamdeck to desktop mode (hold the power button and select the option)
  
• Open the steam application on the desktop and launch the game from there
  
  
• Start a new game
  
  
• Go through the story until the choice between one game mode or the other comes up
  
  
• After making a choice answer YES to the question of changing options
  
  
• Navigate to Graphic options
  
  
• Select Fullscreen mode instead of windowed and click Apply Settings
  
• (Optional) Proceed in the game until you can save
  
  
• (Optional) Press Y to open the menu
  
  
• (Optional) Press the left arrow key once to find the save option
  
  
• (Optional) Save the game
  
  
• Shutdown the game and switch to gaming mode (hold the power button and select the option)
  
• Start the game in gaming mode and it will now work correctly