diff --git a/ersc-script.ps1 b/ersc-script.ps1
new file mode 100644
index 0000000..5f343b6
--- /dev/null
+++ b/ersc-script.ps1
@@ -0,0 +1,74 @@
+$ErrorActionPreference = 'Stop'
+
+$apiUrl = 'https://api.github.com/repos/LukeYui/EldenRingSeamlessCoopRelease/releases/latest'
+$release = Invoke-RestMethod -Uri $apiUrl -Headers @{ 'User-Agent' = 'PowerShell' }
+$scDownloadUrl = $release.assets[0].browser_download_url
+
+function Get-EldenRingGameDir {
+    $steamPaths = @(
+        "$env:ProgramFiles(x86)\Steam\steamapps\common\Elden Ring\Game",
+        "$env:ProgramFiles\Steam\steamapps\common\Elden Ring\Game",
+        "$env:LOCALAPPDATA\Programs\Steam\steamapps\common\Elden Ring\Game"
+    )
+
+    foreach ($path in $steamPaths) {
+        if (Test-Path (Join-Path $path 'eldenring.exe')) { return $path }
+    }
+
+    $drives = Get-PSDrive -PSProvider FileSystem | Select-Object -ExpandProperty Root
+    foreach ($drive in $drives) {
+        $hit = Get-ChildItem -Path $drive -Filter 'eldenring.exe' -Recurse -File -ErrorAction SilentlyContinue |
+            Where-Object { $_.FullName -match '\\Elden Ring\\Game\\eldenring\.exe$' } |
+            Select-Object -First 1
+        if ($hit) { return $hit.DirectoryName }
+    }
+
+    return $null
+}
+
+$eldenringDir = Get-EldenRingGameDir
+
+if (-not $eldenringDir) {
+    $eldenringDir = Read-Host "Could not auto-detect your Elden Ring Game folder. Enter the full Game folder path"
+    if (-not (Test-Path (Join-Path $eldenringDir 'eldenring.exe'))) {
+        throw "Incorrect Elden Ring directory. 'eldenring.exe' not found at provided path."
+    }
+} else {
+    $input = Read-Host "Is this your Elden Ring Game folder? $eldenringDir [Y/n]"
+    if ($input -match '^(n|no)$') {
+        $eldenringDir = Read-Host "Please provide your Elden Ring Game folder path"
+        if (-not (Test-Path (Join-Path $eldenringDir 'eldenring.exe'))) {
+            throw "Incorrect Elden Ring directory. 'eldenring.exe' not found at provided path."
+        }
+    }
+}
+
+$tempDir = Join-Path $PWD 'ersc-download'
+New-Item -ItemType Directory -Path $tempDir -Force | Out-Null
+
+Write-Host "Downloading Seamless Coop"
+Write-Host "Download URL: $scDownloadUrl"
+$zipPath = Join-Path $tempDir 'ersc.zip'
+Invoke-WebRequest -Uri $scDownloadUrl -OutFile $zipPath
+
+Write-Host "Extracting downloaded files"
+Expand-Archive -Path $zipPath -DestinationPath $tempDir -Force
+
+$seamlessDir = Join-Path $tempDir 'SeamlessCoop'
+$launcherPath = Join-Path $eldenringDir 'ersc_launcher.exe'
+
+if (Test-Path $launcherPath) {
+    $input = Read-Host "Override existing Seamless Coop settings? This resets your Seamless Coop settings, including multiplayer password [Y/n]"
+    if ($input -match '^(n|no)$') {
+        $settings = Join-Path $seamlessDir 'ersc_settings.ini'
+        if (Test-Path $settings) { Remove-Item $settings -Force }
+    }
+}
+
+Write-Host "Copying files to Elden Ring Game folder"
+Copy-Item -Path (Join-Path $tempDir '*') -Destination $eldenringDir -Recurse -Force
+
+Write-Host "Cleaning up"
+Remove-Item $tempDir -Recurse -Force
+
+Write-Host "Done. Launch ersc_launcher.exe from the Game folder."
\ No newline at end of file