We would like to ensure that all users experience the best possible performance whilst playing Sonic Lost World, in order to achieve this users MUST meet the suggested minimum specifications as stated on the product page. If you require any further support regarding specific performance of individual GPUs, we’d suggest contacting your graphics card manufacturer.

For any users that are unable to meet the recommended minimum specifications, below we have suggested some command line options that MAY provide better performance in certain scenarios.

It’s important to stress here however, that SEGA doesn’t make any guarantees that these solutions will solve all problems users are experiencing, they are provided to give users freedom to attempt to tailor game performance to individual hardware setups, so that they can enjoy playing Sonic Lost World without issue.

All command line options listed below are unsupported developer functions, users proceed at their sole discretion/risk:

Public Test Branch Access Steps

Click on Sonic Lost World in their steam library, select ‘Properties’.
From Properties select the BETAS tab, and select the publictest branch from the drop down list and close the properties window.
The game should patch (approx. 6mb)


Adding a Command line

https://support.steampowered.com/kb_article.php?ref=1040-JWMT-2947

New commandline options have been added to allow changes to the framerate throttle.

Users can start the game with the following commandline options:

--F30
This will change the expected throttle to 30fps and may help with machines around the minimum spec

--F
This will completely disable framerate locking and allow the machine to run as best as it can, this is the most unstable mode but can be tried as a last resort.

With all speed issues makes sure the game is running on a dedicated accelerated GPU (Check your Nvidia Control Panel or Catalyst Control Center), and try reducing resolution and gfx options to find the best performance.