diff --git a/DXMainClient/DXGUI/Generic/CampaignSelector.cs b/DXMainClient/DXGUI/Generic/CampaignSelector.cs
index 6bd0e77ea..9aae7c6bf 100644
--- a/DXMainClient/DXGUI/Generic/CampaignSelector.cs
+++ b/DXMainClient/DXGUI/Generic/CampaignSelector.cs
@@ -284,7 +284,11 @@ private void LaunchMission(Mission mission)
 
             spawnStreamWriter.WriteLine("CampaignID=" + mission.Index);
             spawnStreamWriter.WriteLine("GameSpeed=" + UserINISettings.Instance.GameSpeed);
+#if YR || ARES
+            spawnStreamWriter.WriteLine("Ra2Mode=" + !mission.RequiredAddon);
+#else
             spawnStreamWriter.WriteLine("Firestorm=" + mission.RequiredAddon);
+#endif
             spawnStreamWriter.WriteLine("CustomLoadScreen=" + LoadingScreenController.GetLoadScreenName(mission.Side.ToString()));
             spawnStreamWriter.WriteLine("IsSinglePlayer=Yes");
             spawnStreamWriter.WriteLine("SidebarHack=" + ClientConfiguration.Instance.SidebarHack);
diff --git a/DXMainClient/Domain/Mission.cs b/DXMainClient/Domain/Mission.cs
index 0ddcc1cfc..b587fcfc5 100644
--- a/DXMainClient/Domain/Mission.cs
+++ b/DXMainClient/Domain/Mission.cs
@@ -26,7 +26,13 @@ public Mission(IniFile iniFile, string sectionName, int index)
                 .FromIniString()
                 .L10N($"INI:Missions:{sectionName}:LongDescription");
             FinalMovie = iniFile.GetStringValue(sectionName, nameof(FinalMovie), "none");
-            RequiredAddon = iniFile.GetBooleanValue(sectionName, nameof(RequiredAddon), false);
+            RequiredAddon = iniFile.GetBooleanValue(sectionName, nameof(RequiredAddon),
+#if YR || ARES
+                true  // In case of YR this toggles Ra2Mode instead which should not be default
+#else
+                false
+#endif
+            );
             Enabled = iniFile.GetBooleanValue(sectionName, nameof(Enabled), true);
             BuildOffAlly = iniFile.GetBooleanValue(sectionName, nameof(BuildOffAlly), false);
             PlayerAlwaysOnNormalDifficulty = iniFile.GetBooleanValue(sectionName, nameof(PlayerAlwaysOnNormalDifficulty), false);