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RollerCoaster Tycoon 3 Platinum

Support for RollerCoaster Tycoon 3: Platinum:


The community is also a great place to check out. Try this link for help from other users:


Issues and fixes


Please review the Third-Party Game Support topic to determine whether your question should be directed to the game developer or to Steam Support. Sending a support request to the wrong party may result in a delay in processing your request.


Retail CD-Keys for this game cannot be registered through Steam. If you wish to create a shortcut to this game under the Library tab, instructions can be found here:

Adding non-Steam games to the Library tab


Verifying your game files

If you're encountering issues when launching or playing RollerCoaster Tycoon 3: Platinum, make sure everything installed correctly.

Start by checking your connection with Steam and then try verifying your game cache. Reboot your computer and test the issue again. If the issue persists, contact RollerCoaster Tycoon 3 support.


Game crash followed by "Failed to start game (app already running)"

If you are receiving the error "Failed to start game (app already running)," your game has silently crashed or failed to launch. Many potential solutions can be found in our article regarding this specific error:

Failed to start Game (app already running).

If you continue to encounter this error, troubleshoot the crash/failure to launch with RollerCoaster Tycoon 3 support.


OS Specific Troubleshooting

If the above does not resolve the issue and you are running Windows 7 or Windows Vista, please complete the instructions in our Windows 7 and Vista Troubleshooting FAQ.

If you are running in Windows XP, take the following steps:

  1. Exit Steam.
  2. Go to the Start menu, select Run, type regedit and click OK.
  3. Navigate to the following registry key: HKEY_CURRENT_USER\SOFTWARE\VALVE
  4. Right click and select Permissions
  5. Check the Allow boxes for Admin and System for both Full control and Read.


Problem with this game?

Contact Support

Problem with Steam?

Contact Steam Support