The game contains several bugs and inconveniences. We can fix some of them by applying the TSPatch from cncnet.org, an avid Command and Conquer multiplayer community. This patch also fixes single player bugs.

NOTE: Steam Deck users will need to boot into the desktop first to enjoy the beautiful KDE Plasma.

1. Download the game from Steam.
   
   
2. Download TSPatch.exe from cncnet.org/tiberian-sun / direct link[downloads.cncnet.org]
   
   
3. Download cnc-ddraw.zip from Github[github.com]
   
   
4. Open TSPatch.exe with one of these options
   
   1. via Wine (you need to navigate to the games folder manually, see step 7)
      
   2. via Protontricks Launcher (prefered, detects location)
   
   
5. Install the patch into the game's folder.
   
   
6. Close the window of the cncnet launcher.
   
   
7. Open the game's folder to access it's files
   
   1. Open the game in your Steam library
      
   2. Click the cog in the upper right corner
      
   3. > Manage
      
   4. > Browse local files
   
   
8. Unpack cnc-ddraw.zip into the game directory.
   
   
9. Open the game's properties and tell Wine to load our patched ddraw.dll
   
   1. Open the game in your Steam library
      
   2. Click the cog in the upper right corner
      
   3. > Properties...
      
   4. Modify the launch options to
      
      WINEDLLOVERRIDES="ddraw=n,b" %command%

It should work with basic wine, but Protontricks Launcher is recommended. It is included in the Protontricks package, if your distribution provides it. Just select the game and it should start in it's prefix, which is the fenced "environment" for the game.

If you are unsure which program will open the TSPatch.exe, just right click on the file and select your preferred launcher from the "Open with" menu.

I may add some screenshots if needed.

If you haven't already, you really should check out gamescope[github.com].

It allows you to run a game in a sort of "virtual monitor" and can apply FSR 1.0 to any game. We will use it to do integer scaling, forced windowed mode and FSR.

Please do not use this on the Steam Deck!.

Even if this is what powers the Steam Deck, it is not recommended to use it as a launch parameter, just use the built-in features (triple dot button). It has the same functionality in an easy to access menu.

1. Open the game in your Steam library
   
2. Click the cog in the upper right corner
   
3. > Properties...
   
4. Modify the launch options to
   
   WINEDLLOVERRIDES="ddraw=n,b" gamescope -w 640 -h 400 -- %command%

After setting these basic settings, we can add some cool features.
Adding these launch parameters between "gamescope" and "-- %command%".
They are separated by a space, the order doesn't matter.

• Window size, note that this is optimized for 1440p and is a 3x scaling of the games resolution.
  
  -W 1920 -H 1200
  
  
• FSR 1.0
  
  -U
  
  
• Integer scaling
  
  -s integer

You can also add other parameters, have a look at "man gamescope"

In my case, this would result in the following launch parameters:


Nvidia sucks. That's probably not news to you.

The problem is that gamescope has limited support for this tiny GPU manufacturer, or vice versa. It should work on newer drivers (>= 515, maybe later), but it also needs the enabled nvidia-drm.modeset=1 kernel module.

Better google it, I won't explain it here. Don't support bad companies next time you buy a GPU.

If there is a good Steam Deck controller layout, please leave me a comment.
It should provide some shortcuts via menus and a the mouse mapped to the touchpad.

Please tell me, if there is something else to add for the Steam Deck.