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How to make Sonic Mania full screen on Steam Deck

If you've installed Sonic Mania using Heroic Launcher then you'll quickly realise that it launches in a windowed version that fills about 50% of the screen. Seemingly changing the in-game settings causes it to crash with a 'black screen of death'.

There's a fairly simple fix however.

You need to edit the settings.ini file located in: Home/deck/Games/Heroic/Prefixes/Sonic-Mania/pfx/drive_c/users/steamuser/AppData/Local/Sega/SonicMania

Set the following:



Save the file, relaunch the game. Sorted.

#gaming #steamdeck

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