Clarify which environments steamworks is supported in

src/locales/en.json

@@ -457,11 +457,11 @@
       "string": "Zip, combine assets into single file (not recommended)"
     },
     "application-win32": {
-      "string": "{type} Windows application (32-bit or 64-bit)",
+      "string": "{type} Windows application (32-bit)",
       "context": "type will become something like 'NW.js' or 'Electron'. Do not translate 'Windows'."
     },
     "application-win64": {
-      "string": "{type} Windows application (64-bit only, not recommended)",
+      "string": "{type} Windows application (64-bit)",
       "context": "type will become something like 'NW.js' or 'Electron'. Do not translate 'Windows'."
     },
     "application-win-arm": {
@@ -558,7 +558,7 @@
       "string": "Increase max vector costume resolution to make large costumes look better. May increase memory use and cause crashes."
     },
     "steamworksUnavailable": {
-      "string": "To enable the Steamworks extension, you must use one of the Electron environments."
+      "string": "To enable the Steamworks extension, you must use one of these environments:"
     },
     "steamworksAvailable": {
       "string": "This project is using the Steamworks extension. You can find your game's app ID in Steamworks. 480 is the ID of the Steamworks demo game (Spacewar)."

src/p4/PackagerOptions.svelte

@@ -1021,7 +1021,7 @@
     }}
   >
     <h2>Steamworks</h2>
-    {#if $options.target.startsWith('electron-')}
+    {#if ['electron-win64', 'electron-linux64', 'electron-mac'].includes($options.target)}
       <p>{$_('options.steamworksAvailable')}</p>
       <label class="option">
         {$_('options.steamworksAppId')}
@@ -1037,6 +1037,11 @@
       </label>
     {:else}
       <p>{$_('options.steamworksUnavailable')}</p>
+      <ul>
+        <li>{$_('options.application-win64').replace('{type}', 'Electron')}</li>
+        <li>{$_('options.application-mac').replace('{type}', 'Electron')}</li>
+        <li>{$_('options.application-linux64').replace('{type}', 'Electron')}</li>
+      </ul>
     {/if}
   </Section>
 {/if}

src/packager/packager.js

@@ -732,7 +732,10 @@ app.whenReady().then(() => {
 const {contextBridge, ipcRenderer} = require('electron');
 `;
 
-    if (this.project.analysis.usesSteamworks) {
+    if (
+      this.project.analysis.usesSteamworks &&
+      ['electron-win64', 'electron-linux64', 'electron-mac'].includes(this.options.target)
+    ) {
       mainJS += `
       const enableSteamworks = () => {
         const APP_ID = +${JSON.stringify(this.options.steamworks.appId)};