Game pauses or minimizes when unfocused - fix

[TheByterr]

Problem

When running the game in windowed or borderless mode, the game pauses or sometimes minimizes when focus is lost (e.g. clicking outside or alt-tabbing).

This makes multitasking difficult and differs from behavior in newer Unity-based games.

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Cause

This appears to be Unity's default behavior where:

Application.runInBackground = false

When the window loses focus, Unity pauses or throttles the game.

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Fix

Setting:

Application.runInBackground = true;

prevents the pause entirely and allows the game to continue running when unfocused.

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Testing

I verified this by patching Assembly-CSharp.dll (DotMod version) via dnSpy:

public void Start()
{
    Application.runInBackground = true;
}