General

Issues that may occur in general, as in not limited to a specific game.

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Lag / 10 - 30fps

This occurs (mainly) when using proton. To do this, disable F-Sync or run the game under Wine/Natively.
osu! players read this

Game doesn't open in terminal / appmenu

Check ~/.local/bin, if "osu-wine" is there, but it doesn't open in when you type that, it likely means that your shell isn't indexing .local/share/bin.
Different distros ship with different shells, configs and other stuff, so make sure to check what you're on and then search on how to index it manually.
You can check your shell by pasting "echo $SHELL". Then search how to add local bin to bash (replace bash with your shell)
..or just ask AI, really.

If your game doesn't appear in your appmenu, you need to create a desktop entry for it.

Interlude

[Desktop File] Make launching Interlude easier.

A custom .desktop file for Interlude

Navigate to ~/.local/share/applications, and then create "interlude.desktop".
Paste the following:

    [Desktop Entry]

    Name=Interlude

    Comment=The best VSRG on the planet.

    Exec=/PATH/TO/INTERLUDE/launch.sh

    Icon=/PATH/TO/ICON/Interlude.png

    Terminal=false

    Type=Application

    Categories=Game;

Now, you should be able to launch interlude. If not, follow below.

Navigate to ~/.local/bin/
Create "interlude" & save it.

    #!/usr/bin/env bash
    cd ~/InterludeFolder && ./launch.sh
        

Save it and edit your desktop file to open that instead of the previous "Exec" argument.

Exec=/PATH/TO/INTERLUDE/launch.sh