diff --git a/core/src/com/unciv/models/metadata/GameParameters.kt b/core/src/com/unciv/models/metadata/GameParameters.kt
index 69e1217e3b..f41f3268cf 100644
--- a/core/src/com/unciv/models/metadata/GameParameters.kt
+++ b/core/src/com/unciv/models/metadata/GameParameters.kt
@@ -21,4 +21,19 @@ class GameParameters { // Default values are the default new game
 
     var isOnlineMultiplayer = false
     var mods = HashSet<String>()
+
+    fun clone(): GameParameters {
+        val parameters=GameParameters()
+        parameters.difficulty=difficulty
+        parameters.gameSpeed=gameSpeed
+        parameters.players= ArrayList(players)
+        parameters.numberOfCityStates=numberOfCityStates
+        parameters.noBarbarians=noBarbarians
+        parameters.oneCityChallenge=oneCityChallenge
+        parameters.victoryTypes= ArrayList(victoryTypes)
+        parameters.startingEra=startingEra
+        parameters.isOnlineMultiplayer=isOnlineMultiplayer
+        parameters.mods= HashSet(mods)
+        return parameters
+    }
 }
\ No newline at end of file
diff --git a/core/src/com/unciv/ui/newgamescreen/NewGameScreen.kt b/core/src/com/unciv/ui/newgamescreen/NewGameScreen.kt
index 21d91ef336..a463367774 100644
--- a/core/src/com/unciv/ui/newgamescreen/NewGameScreen.kt
+++ b/core/src/com/unciv/ui/newgamescreen/NewGameScreen.kt
@@ -13,17 +13,17 @@ import com.unciv.logic.civilization.PlayerType
 import com.unciv.models.ruleset.RulesetCache
 import com.unciv.models.translations.tr
 import com.unciv.ui.pickerscreens.PickerScreen
+import com.unciv.ui.utils.Popup
 import com.unciv.ui.utils.disable
 import com.unciv.ui.utils.enable
 import com.unciv.ui.utils.onClick
 import com.unciv.ui.worldscreen.mainmenu.OnlineMultiplayer
-import com.unciv.ui.utils.Popup
 import java.util.*
 import kotlin.concurrent.thread
 
 class NewGameScreen: PickerScreen(){
 
-    val newGameParameters= UncivGame.Current.gameInfo.gameParameters
+    val newGameParameters= UncivGame.Current.gameInfo.gameParameters.clone()
     val mapParameters = UncivGame.Current.gameInfo.tileMap.mapParameters
     val ruleset = RulesetCache.getComplexRuleset(newGameParameters.mods)