diff --git a/ue4-release.ps1 b/ue4-release.ps1
index 80b267f..3f1bf6d 100644
--- a/ue4-release.ps1
+++ b/ue4-release.ps1
@@ -1,12 +1,9 @@
 [CmdletBinding()] # Fail on unknown args
 param (
     # Version to release
-    [Parameter(Mandatory=$true)]
     [string]$version,
-    # Variant name to release
-    [Parameter(Mandatory=$true)]
-    # Project folder (assumes current dir if not specified)
-    [string]$variant,
+    # Variant name(s) to release; if not specified release all DefaultVariants with ReleaseTo options
+    [array]$variants,
     # Source folder, current dir if omitted
     [string]$src,
     # Which service(s) to release on e.g. "steam": defaults to "ReleaseTo" services in packageconfig.json for variant 
@@ -28,13 +25,13 @@ function Write-Usage {
     Write-Output "Usage:"
     Write-Output "  ue4-release.ps1 -version:ver -variant:var -services:steam,itch [-src:sourcefolder] [-dryrun]"
     Write-Output " "
-    Write-Output "  -version:ver    : Version to release; must have been packaged already"
-    Write-Output "  -variant:var    : Name of package variant to release"
-    Write-Output "  -services:s1,s2 : Name of services to release to. Can omit and rely on ReleaseTo"
-    Write-Output "                    setting of variant in packageconfig.json "
-    Write-Output "  -src            : Source folder (current folder if omitted), must contain packageconfig.json"
-    Write-Output "  -dryrun         : Don't perform any actual actions, just report what would happen"
-    Write-Output "  -help           : Print this help"
+    Write-Output "  -version:ver        : Version to release; must have been packaged already"
+    Write-Output "  -variants:var1,var2 : Name of variants to release. Omit to use DefaultVariants"
+    Write-Output "  -services:s1,s2     : Name of services to release to. Can omit and rely on ReleaseTo"
+    Write-Output "                        setting of variant in packageconfig.json "
+    Write-Output "  -src                : Source folder (current folder if omitted), must contain packageconfig.json"
+    Write-Output "  -dryrun             : Don't perform any actual actions, just report what would happen"
+    Write-Output "  -help               : Print this help"
 }
 
 $ErrorActionPreference = "Stop"
@@ -49,6 +46,11 @@ if ($src.Length -eq 0) {
     Write-Verbose "-src not specified, assuming current directory"
 }
 
+if (-not $version) {
+    Write-Output "Mandatory argument: version"
+    Exit 1
+}
+
 Write-Output "~-~-~ UE4 Release Helper Start ~-~-~"
 
 try {
@@ -56,55 +58,67 @@ try {
     # Import config
     $config = Read-Package-Config -srcfolder:$src
 
-    # Find variant (first match in case config has many)
-    $variantConfig = $config.Variants | Where-Object { $_.Name -eq $variant }
-    if ($variantConfig -is [array]) {
-        if ($variantConfig.Count > 1) {
-            throw "More than one package variant called $variant in packageconfig.json, ambiguous!"
-        } else {
-            # Don't think this will happen but still
-            $variantConfig = $variantConfig[0]
-        }
-    }
-
-    # Get source dir
-    $sourcedir = Get-Package-Client-Dir -config:$config -versionNumber:$version -variantName:$variant
-
-    if (-not (Test-Path $sourcedir -PathType Container)) {
-        throw "Release folder $sourcedir does not exist"
-    }
-
-    # Find service(s)
-    if ($services) {
-        # Release to a subset of allowed services
-        $servicesFound = $services | Where-Object {$variantConfig.ReleaseTo -contains $_ }
-        if ($servicesFound.Count -ne $services.Count) {
-            $unmatchedServices = $services | Where-Object { $servicesFound -notcontains $_ } 
-            Write-Warning "Services(s) not supported by $($variantConfig.Name): $($unmatchedServices -join ", ")"
+    if ($variants) {
+        $variantConfigs = $config.Variants | Where-Object { $_.Name -in $variants }
+        if ($variantConfigs.Count -ne $variants.Count) {
+            $unmatchedVariants = $variants | Where-Object { $_ -notin $variantConfigs.Name } 
+            Write-Warning "Variant(s) not found, ignoring: $($unmatchedVariants -join ", ")"
         }
     } else {
-        $servicesFound = $variantConfig.ReleaseTo
+        # Use default variants
+        $variantConfigs = $config.Variants | Where-Object { $_.Name -in $config.DefaultVariants }
     }
 
-    if (-not $servicesFound) {
-        throw "No matching services to release $variant to"
-    }
+    $hasErrors = $false
+    foreach ($variantConfig in $variantConfigs) {
 
-    Write-Output ""
-    Write-Output "Variant         : $variant"
-    Write-Output "Source Folder   : $sourcedir"
-    Write-Output "Service(s)      : $($servicesFound -join ", ")"
-    Write-Output ""
+        # Get source dir
+        $sourcedir = Get-Package-Client-Dir -config:$config -versionNumber:$version -variantName:$variantConfig.Name
 
-
-    foreach ($service in $servicesFound) {
-        if ($service -eq "steam") {
-            Release-Steam -config:$config -variant:$variantConfig -sourcefolder:$sourcedir -version:$version -dryrun:$dryrun
-        } elseif ($service -eq "itch") {
-            Release-Itch -config:$config -variant:$variantConfig -sourcefolder:$sourcedir -version:$version -dryrun:$dryrun
-        } else {
-            throw "Unknown release service: $service"
+        if (-not (Test-Path $sourcedir -PathType Container)) {
+            Write-Error "Release folder $sourcedir does not exist, skipping"
+            $hasErrors = $true
+            continue
         }
+
+        # Find service(s)
+        if ($services) {
+            # Release to a subset of allowed services
+            $servicesFound = $services | Where-Object {$variantConfig.ReleaseTo -contains $_ }
+            if ($servicesFound.Count -ne $services.Count) {
+                $unmatchedServices = $services | Where-Object { $servicesFound -notcontains $_ } 
+                Write-Warning "Services(s) not supported by $($variantConfig.Name): $($unmatchedServices -join ", ")"
+            }
+        } else {
+            $servicesFound = $variantConfig.ReleaseTo
+        }
+
+        if (-not $servicesFound) {
+            Write-Verbose "Skipping $($variantConfig.Name), no matching release services"
+            continue
+        }
+
+        Write-Output ""
+        Write-Output "Variant         : $($variantConfig.Name)"
+        Write-Output "Source Folder   : $sourcedir"
+        Write-Output "Service(s)      : $($servicesFound -join ", ")"
+        Write-Output ""
+
+
+        foreach ($service in $servicesFound) {
+            if ($service -eq "steam") {
+                Release-Steam -config:$config -variant:$variantConfig -sourcefolder:$sourcedir -version:$version -dryrun:$dryrun
+            } elseif ($service -eq "itch") {
+                Release-Itch -config:$config -variant:$variantConfig -sourcefolder:$sourcedir -version:$version -dryrun:$dryrun
+            } else {
+                throw "Unknown release service: $service"
+            }
+        }
+
+    }
+
+    if ($hasErrors) {
+        throw "Errors occurred, see above"
     }
 
 } catch {