Steam and OMORI

Configure Steam and ensure the OMORI installation is unmodded.

Open Steam Properties

If you are using a Steam Deck, make sure you are in Desktop Mode and have connected your system to your USB-C hub.

  • Open Steam and go to your Library.

  • Locate OMORI in your list of games.

  • Right-click it and select Properties.

Disable Automatic Updates

OMORI is unlikely to get another update in the near future, but if it does, your mods will probably stop working until their mod creators can update them. To avoid any nasty surprises, we're going to disable automatic updates for OMORI.

  • In the Properties window, select the Updates tab.

  • Set Automatic Updates to Only updates this game when I launch it.

Enable Steam Input (Windows)

If you want to play OMORI with the keyboard and not a controller, you can skip this step.

If you're setting up OMO CEP Lite on a Steam Deck, skip this step unless you plan on connecting another controller to your system.

DirectInput game controllers (PlayStation, Nintendo) don't seem to work well with OMORI. We're going to enable Steam Input to force the game to recognize all controller types.

  • In the Properties window, select the Controller tab.

  • Set Override for OMORI to Enable Steam Input.

Clean Game Files

OMO CEP is only compatible with the latest unmodified version of the game.

To save a lot of time later, let's take a little time now to make sure you have the latest version of OMORI and that it's not modified in any way.

Opt Out of Betas

OMORI's developers have given users the ability to roll back to any previous version of the game through Steam's beta build feature. These older versions aren't compatible with OMO CEP, so we'll make sure you aren't using one.

  • In the Properties window, select the Betas tab.

  • Set Select the beta you would like to opt into to None.

Verify Game Files

This command will compare your installed OMORI files to the versions on Steam's servers. If Steam detects any changes, it will redownload the original files.

  • In the Properties window, select the Local Files tab.

  • Click Verify integrity of game files... and wait for the validation process to complete.

    • If there are no changed files, Steam will tell you validation is complete.

    • If there are changed files (e.g. you modded the game with GOMORI), Steam will reacquire the correct ones.

Keep the Local Files window open as we will need it for the next step.

Next Steps


pageInstalling OMO CEP

Steam Deck

pageInstalling OMO CEP Lite

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