A simple Powershell save game backup script to cheese Mordheim: City of the Damned

mordheim.ps1

$Process = @(Get-CimInstance Win32_Process -Filter "Name='powershell.exe' AND CommandLine LIKE '%mordheim.ps1%'")
if ($Process.Count -gt 1) {
    exit
}

Add-Type -Name Window -Namespace Console -MemberDefinition '
[DllImport("Kernel32.dll")]
public static extern IntPtr GetConsoleWindow();

[DllImport("user32.dll")]
public static extern bool ShowWindow(IntPtr hWnd, Int32 nCmdShow);
'

$SteamRegistryPath = "hkcu:\Software\Valve\Steam"
$SteamPath = Get-ItemProperty -Path $SteamRegistryPath -Name SteamPath
$MordheimSavesPath = $SteamPath.SteamPath + "/userdata/81398979/276810"
$MordheimBackupsPath = [Environment]::GetFolderPath("MyDocuments") + "\Mordheim copied saves\276810"

Function Hide-Console {
    $ConsolePtr = [Console.Window]::GetConsoleWindow()
    [Console.Window]::ShowWindow($ConsolePtr, 0)
}

Function SaveClick([System.Windows.Forms.TextBox]$TextBox) {
    if (Test-Path $MordheimSavesPath) {
        if (Test-Path $MordheimBackupsPath) {
            Rename-Item -Path $MordheimBackupsPath -NewName ($MordheimBackupsPath + ".bak")
        }
        try {
            Copy-Item -Path $MordheimSavesPath -Destination $MordheimBackupsPath -Recurse
            $TextBox.Text = "Mordheim saves backed up."
        }
        catch {
            if (Test-Path $MordheimBackupsPath) {
                Remove-Item $MordheimBackupsPath -Recurse
            }
            Rename-Item -Path ($MordheimBackupsPath + ".bak") -NewName $MordheimBackupsPath
            $TextBox.Text = "Unable to backup Mordheim saves.";
        }
        if (Test-Path ($MordheimBackupsPath + ".bak")) {
            Remove-Item -Path ($MordheimBackupsPath + ".bak") -Recurse
        }
    }
    else {
        $TextBox.Text = "Unable to find Mordheim saves."
        #$TextBox.Text = $MordheimSavesPath
    }
}

Function LoadClick([System.Windows.Forms.TextBox]$TextBox) {
    if (Test-Path $MordheimBackupsPath) {
        if (Test-Path $MordheimSavesPath) {
            Remove-Item -Path $MordheimSavesPath -Recurse
        }
        Copy-Item -Path $MordheimBackupsPath -Destination $MordheimSavesPath -Recurse
        $TextBox.Text = "Mordheim backups restored."
    }
    else {
        $TextBox.Text = "Unable to find Mordheim backups."
    }
}

Function Minimise([System.Windows.Forms.Form]$Form) {
    $Form.WindowState = [System.Windows.Forms.FormWindowState]::Minimized
}

Function Generate-Form {

    Add-Type -AssemblyName System.Windows.Forms    
    Add-Type -AssemblyName System.Drawing
    
    $Form = New-Object System.Windows.Forms.Form
    $Form.Text = "Mordheim Backups"
    $Form.Size = New-Object System.Drawing.Size(200, 200)
    $Form.StartPosition = "CenterScreen"
    $Form.Topmost = $True
    $Form.MaximizeBox = $false
    $Form.MinimizeBox = $false
    $Form.FormBorderStyle = [System.Windows.Forms.FormBorderStyle]::FixedDialog

    $TextBox = New-Object System.Windows.Forms.TextBox 
    $TextBox.Location = New-Object System.Drawing.Size(5, 105)
    $TextBox.Size = New-Object System.Drawing.Size(175, 23)
    $TextBox.Enabled = $false

    $SaveButton = New-Object System.Windows.Forms.Button
    $SaveButton.Location = New-Object System.Drawing.Size(35, 35)
    $SaveButton.Size = New-Object System.Drawing.Size(120, 23)
    $SaveButton.Text = "Save"
    $SaveButton.Add_Click({ (SaveClick $TextBox) })

    $LoadButton = New-Object System.Windows.Forms.Button
    $LoadButton.Location = New-Object System.Drawing.Size(35, 70)
    $LoadButton.Size = New-Object System.Drawing.Size(120, 23)
    $LoadButton.Text = "Load"
    $LoadButton.Add_Click({ (LoadClick $TextBox ) })
    
    $Form.Controls.Add($SaveButton)
    $Form.Controls.Add($LoadButton)
    $Form.Controls.Add($TextBox)
    $Form.Add_Deactivate({ (Minimise $Form) })
 
    $form.ShowDialog()| Out-Null
}

Hide-Console
Generate-Form

I just didn't have the time to play Mordheim properly so I created a script that could backup and restore the save files. Just download it and run it (try the context menu - right click on the script). The GUI automatically minimises when focus is lost. Saving can be performed when Mordheim is running, but loading probably needs to be done when Mordheim is not. No guarantees that it works and make sure you know you're doing something safe before downloading and running a strange script off the internet.