diff --git a/android/assets/mods/myFirstMod/jsons/Units.json b/android/assets/mods/myFirstMod/jsons/Units.json
index 524362ba8e..ec9d5aef4c 100644
--- a/android/assets/mods/myFirstMod/jsons/Units.json
+++ b/android/assets/mods/myFirstMod/jsons/Units.json
@@ -1,13 +1,16 @@
 [
 	{
-		name:"Warrior",
+		name:"Maori Warrior",
 		unitType:"Melee",
+		uniqueTo:"Polynesia",
+		replaces:"Warrior",
 		movement:2,
-		strength:12,
+		strength:80,
 		cost: 40,
 		hurryCostModifier:20,
 		obsoleteTech:"Metal Casting",
+		promotions:["Haka War Dance"],
 		upgradesTo:"Swordsman",
 		attackSound:"nonmetalhit"
-	}
+	},
 ]
\ No newline at end of file
diff --git a/core/src/com/unciv/models/ruleset/Ruleset.kt b/core/src/com/unciv/models/ruleset/Ruleset.kt
index e98ccc5208..3c9c709dc3 100644
--- a/core/src/com/unciv/models/ruleset/Ruleset.kt
+++ b/core/src/com/unciv/models/ruleset/Ruleset.kt
@@ -13,7 +13,8 @@ import com.unciv.models.stats.INamed
 import kotlin.collections.set
 
 class Ruleset {
-    val mods = ArrayList<String>()
+    var name=""
+    val mods = LinkedHashSet<String>()
     val buildings = LinkedHashMap<String, Building>()
     val terrains = LinkedHashMap<String, Terrain>()
     val tileResources = LinkedHashMap<String, TileResource>()
@@ -25,7 +26,20 @@ class Ruleset {
     val policyBranches = LinkedHashMap<String, PolicyBranch>()
     val difficulties = LinkedHashMap<String, Difficulty>()
 
+    fun clone(): Ruleset{
+        val newRuleset = Ruleset(false)
+        newRuleset.add(this)
+        return newRuleset
+    }
+
+    constructor(load:Boolean=true){
+        if(load) load()
+    }
+
+
     fun <T> getFromJson(tClass: Class<T>, filePath:String): T {
+        val file = Gdx.files.internal(filePath)
+        if(!file.exists()) return tClass Array<>().first()
         val jsonText = Gdx.files.internal(filePath).readString(Charsets.UTF_8.name())
         return Json().apply { ignoreUnknownFields = true }.fromJson(tClass, jsonText)
     }
@@ -37,24 +51,32 @@ class Ruleset {
         return hashMap
     }
 
-    fun clone(): Ruleset{
-        val newRuleset = Ruleset(false)
-        newRuleset.buildings.putAll(buildings)
-        newRuleset.difficulties.putAll(difficulties)
-        newRuleset.nations .putAll(nations)
-        newRuleset.policyBranches.putAll(policyBranches)
-        newRuleset.technologies.putAll(technologies)
-        newRuleset.buildings.putAll(buildings)
-        newRuleset.terrains.putAll(terrains)
-        newRuleset.tileImprovements.putAll(tileImprovements)
-        newRuleset.tileResources.putAll(tileResources)
-        newRuleset.unitPromotions.putAll(unitPromotions)
-        newRuleset.units.putAll(units)
-        return newRuleset
+    fun add(ruleset: Ruleset){
+        buildings.putAll(ruleset.buildings)
+        difficulties.putAll(ruleset.difficulties)
+        nations .putAll(ruleset.nations)
+        policyBranches.putAll(ruleset.policyBranches)
+        technologies.putAll(ruleset.technologies)
+        buildings.putAll(ruleset.buildings)
+        terrains.putAll(ruleset.terrains)
+        tileImprovements.putAll(ruleset.tileImprovements)
+        tileResources.putAll(ruleset.tileResources)
+        unitPromotions.putAll(ruleset.unitPromotions)
+        units.putAll(ruleset.units)
     }
 
-    constructor(load:Boolean=true){
-        if(load) load()
+    fun clearExceptModNames(){
+        buildings.clear()
+        difficulties.clear()
+        nations.clear()
+        policyBranches.clear()
+        technologies.clear()
+        buildings.clear()
+        terrains.clear()
+        tileImprovements.clear()
+        tileResources.clear()
+        unitPromotions.clear()
+        units.clear()
     }
 
     fun load(folderPath: String="jsons") {
diff --git a/core/src/com/unciv/ui/newgamescreen/NewGameScreen.kt b/core/src/com/unciv/ui/newgamescreen/NewGameScreen.kt
index 053b316b79..647ef01eac 100644
--- a/core/src/com/unciv/ui/newgamescreen/NewGameScreen.kt
+++ b/core/src/com/unciv/ui/newgamescreen/NewGameScreen.kt
@@ -25,7 +25,7 @@ class NewGameScreen: PickerScreen(){
 
     val newGameParameters= UncivGame.Current.gameInfo.gameParameters
     val mapParameters = UncivGame.Current.gameInfo.tileMap.mapParameters
-    val ruleSet = UncivGame.Current.ruleset
+    val ruleSet = UncivGame.Current.ruleset.clone()
 
     init {
         setDefaultCloseAction()
diff --git a/core/src/com/unciv/ui/newgamescreen/NewGameScreenOptionsTable.kt b/core/src/com/unciv/ui/newgamescreen/NewGameScreenOptionsTable.kt
index 6341b1abc2..1313df5e39 100644
--- a/core/src/com/unciv/ui/newgamescreen/NewGameScreenOptionsTable.kt
+++ b/core/src/com/unciv/ui/newgamescreen/NewGameScreenOptionsTable.kt
@@ -16,10 +16,11 @@ import com.unciv.models.translations.tr
 import com.unciv.ui.utils.CameraStageBaseScreen
 import com.unciv.ui.utils.toLabel
 
-class NewGameScreenOptionsTable(val newGameScreen: NewGameScreen, val onMultiplayerToggled:()->Unit)
+class NewGameScreenOptionsTable(val newGameScreen: NewGameScreen, val updatePlayerPickerTable:()->Unit)
     : Table(CameraStageBaseScreen.skin) {
     val newGameParameters = newGameScreen.newGameParameters
     val mapParameters = newGameScreen.mapParameters
+    val baseRuleset = newGameScreen.ruleSet.clone()
     val ruleset = newGameScreen.ruleSet
 
     init {
@@ -133,7 +134,7 @@ class NewGameScreenOptionsTable(val newGameScreen: NewGameScreen, val onMultipla
         isOnlineMultiplayerCheckbox.addListener(object : ChangeListener() {
             override fun changed(event: ChangeEvent?, actor: Actor?) {
                 newGameParameters.isOnlineMultiplayer = isOnlineMultiplayerCheckbox.isChecked
-                onMultiplayerToggled()
+                updatePlayerPickerTable()
             }
         })
         add(isOnlineMultiplayerCheckbox).colspan(2).row()
@@ -225,20 +226,44 @@ class NewGameScreenOptionsTable(val newGameScreen: NewGameScreen, val onMultipla
 
         val modCheckboxTable = Table().apply { defaults().pad(10f) }
 
-        val mods = Gdx.files.local("mods")
+        val modFolders = Gdx.files.local("mods")
+        val loadableMods = ArrayList<Ruleset>()
 
-        for (modFolder in mods.list()) {
+        for (modFolder in modFolders.list()) {
             if (modFolder.list().any { it.name() == "jsons" }) {
                 val ruleSet = Ruleset(false)
 
                 try {
-                    val modRuleset = ruleSet.load(modFolder.path() + "/jsons")
-
+                    ruleSet.load(modFolder.path() + "/jsons")
+                    ruleSet.name = modFolder.nameWithoutExtension()
+                    loadableMods.add(ruleset)
                 } catch (ex: Exception) {
+                    print(ex.message)
                 }
             }
         }
 
+        fun reloadMods(){
+            ruleset.clearExceptModNames()
+            ruleset.add(baseRuleset)
+            for(modName in ruleset.mods){
+                val correspondingMod = loadableMods.first { it.name==modName }
+                ruleset.add(correspondingMod)
+            }
+        }
+
+        for(mod in loadableMods){
+            val checkBox = CheckBox(mod.name,CameraStageBaseScreen.skin)
+            checkBox.addListener(object : ChangeListener() {
+                override fun changed(event: ChangeEvent?, actor: Actor?) {
+                    if(checkBox.isChecked) ruleset.mods.add(mod.name)
+                    else ruleset.mods.remove(mod.name)
+                    reloadMods()
+                    updatePlayerPickerTable()
+                }
+            })
+        }
+
         add(modCheckboxTable).colspan(2).row()
     }