Run X4 with debug on, keeps the powershell window open following the main debug log file, and filters out some spam that usually isn't helpful

start-x4-debug.ps1

###### Config ######
$X4InstallDir = "C:\GOG Games\X4 Foundations"
# Saves the filtered logfile to $LogFileName, and the unfiltered logfile to $LogFileName-verbose
$SeparateVerboseLogs = $true
#$MakeShortcutPath = "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\X4 - Foundations [GOG.com]\X4 - Foundations.lnk"

# Define filters to remove the spam from the output
$filters = @(
    "======================================"
    "Failed to verify the file signature"
    "VROProtectRandomStationSCA"
    ".sig"
    "ui_mon_eve_money_down_3.wav"
    "ERR: 40962 AL_INVALID_ENUM"
    "Economy_Verbose"
)

$X4Executable = (Get-ChildItem -path "$X4InstallDir\X4.exe").Fullname
$TimeStamp    = Get-Date -Format "yyyy_MM_dd__hh_mm_ss"
$UserDocsDir = [Environment]::GetFolderPath("MyDocuments")
$X4UserDocsDir = Join-Path $UserDocsDir "Egosoft/X4"
$LogFileName = "x4-game-$TimeStamp.log"
$ArgLogFileName = If ($SeparateVerboseLogs) { "x4-game-$TimeStamp-verbose.log" } Else { $LogFileName }
$LogsDir = Join-Path $X4UserDocsDir "logs"

# Define arguments to pass to X4
$ArgList = @(
    "-nosoundthrottle"
    "-nocputhrottle"
    "-showfps"
    "-debug all"
    "-scriptlogfiles"
    "-logfile $ArgLogFileName"
)

function Get-Child-Logs {
    Get-ChildItem -Path $LogPath -Recurse -Exclude $ExcludeScriptLogs
}

# function Make-Shortcut {
#         $ScriptPath = "$CurrentDir\$($MyInvocation.MyCommand.Name)"
#         $WshShell = New-Object -comObject WScript.Shell
#         $Shortcut = $WshShell.CreateShortcut("$MakeShortcutPath")
#         $Shortcut.IconLocation = "$X4Executable, 0"
#         $Shortcut.TargetPath = "$env:SystemRoot\System32\WindowsPowerShell\v1.0\powershell.exe"
#         $Shortcut.Arguments = "-ExecutionPolicy ByPass -File ""$ScriptPath"""
#         $Shortcut.Save()
# }

function Start-X4 {
    Start-Process -WorkingDirectory $X4InstallDir -FilePath $X4Executable -ArgumentList $ArgList
}

function Tail-Log {
    Write-Output "Tailing log file $ArgLogFileName..."
    Get-Content "$ArgLogFileName" -wait -tail 1000 | ForEach-Object {
        $line = $_
        $notMatching = $true
        foreach ($pattern in $filters) {
            if ($line -match $pattern) {
                $notMatching = $false
                break
            }
        }
        if ($notMatching) {
            Write-Output $line
        }
        if ($SeparateVerboseLogs) {
            Write-Output $line | Out-File -Append -FilePath $LogFileName
        }
    }
}

#Make-Shortcut
Start-X4
Write-Output "Waiting for game to start..."
Start-Sleep -s 15
Tail-Log

Edited it to optionally output the filtered and unfiltered logs to different files.