diff --git a/android/assets/jsons/translations/template.properties b/android/assets/jsons/translations/template.properties
index 9883c90384..906dfadc89 100644
--- a/android/assets/jsons/translations/template.properties
+++ b/android/assets/jsons/translations/template.properties
@@ -320,6 +320,7 @@ Perlin =
 Continents = 
 Four Corners = 
 Archipelago = 
+Inner Sea = 
 Number of City-States = 
 One City Challenge = 
 No Barbarians = 
diff --git a/core/src/com/unciv/logic/map/MapParameters.kt b/core/src/com/unciv/logic/map/MapParameters.kt
index fa3b7f2348..f573c257c5 100644
--- a/core/src/com/unciv/logic/map/MapParameters.kt
+++ b/core/src/com/unciv/logic/map/MapParameters.kt
@@ -117,6 +117,7 @@ object MapType {
     const val fourCorners = "Four Corners"
     const val perlin = "Perlin"
     const val archipelago = "Archipelago"
+    const val innerSea = "Inner Sea"
 
     // Cellular automata
     const val default = "Default"
diff --git a/core/src/com/unciv/logic/map/mapgenerator/MapLandmassGenerator.kt b/core/src/com/unciv/logic/map/mapgenerator/MapLandmassGenerator.kt
index a9a68efb3f..70f8cdcc90 100644
--- a/core/src/com/unciv/logic/map/mapgenerator/MapLandmassGenerator.kt
+++ b/core/src/com/unciv/logic/map/mapgenerator/MapLandmassGenerator.kt
@@ -20,7 +20,8 @@ class MapLandmassGenerator(val ruleset: Ruleset, val randomness: MapGenerationRa
         }
 
         when (tileMap.mapParameters.type) {
-            MapType.pangaea -> createPangea(tileMap)
+            MapType.pangaea -> createPangaea(tileMap)
+            MapType.innerSea -> createInnerSea(tileMap)
             MapType.continents -> createTwoContinents(tileMap)
             MapType.fourCorners -> createFourCorners(tileMap)
             MapType.perlin -> createPerlin(tileMap)
@@ -70,7 +71,7 @@ class MapLandmassGenerator(val ruleset: Ruleset, val randomness: MapGenerationRa
         }
     }
 
-    private fun createPangea(tileMap: TileMap) {
+    private fun createPangaea(tileMap: TileMap) {
         val elevationSeed = randomness.RNG.nextInt().toDouble()
         for (tile in tileMap.values) {
             var elevation = randomness.getPerlinNoise(tile, elevationSeed)
@@ -79,6 +80,15 @@ class MapLandmassGenerator(val ruleset: Ruleset, val randomness: MapGenerationRa
         }
     }
 
+    private fun createInnerSea(tileMap: TileMap) {
+        val elevationSeed = randomness.RNG.nextInt().toDouble()
+        for (tile in tileMap.values) {
+            var elevation = randomness.getPerlinNoise(tile, elevationSeed)
+            elevation -= getEllipticContinent(tile, tileMap, 0.6) * 0.3
+            spawnLandOrWater(tile, elevation, tileMap.mapParameters.waterThreshold.toDouble())
+        }
+    }
+
     private fun createTwoContinents(tileMap: TileMap) {
         val elevationSeed = randomness.RNG.nextInt().toDouble()
         for (tile in tileMap.values) {
@@ -101,9 +111,9 @@ class MapLandmassGenerator(val ruleset: Ruleset, val randomness: MapGenerationRa
      * Create an elevation map that favors a central elliptic continent spanning over 85% - 95% of
      * the map size.
      */
-    private fun getEllipticContinent(tileInfo: TileInfo, tileMap: TileMap): Double {
+    private fun getEllipticContinent(tileInfo: TileInfo, tileMap: TileMap, percentOfMap: Double = 0.85): Double {
         val randomScale = randomness.RNG.nextDouble()
-        val ratio = 0.85 + 0.1 * randomness.RNG.nextDouble()
+        val ratio = percentOfMap + 0.1 * randomness.RNG.nextDouble()
 
         val a = ratio * tileMap.maxLongitude
         val b = ratio * tileMap.maxLatitude
diff --git a/core/src/com/unciv/ui/newgamescreen/MapParametersTable.kt b/core/src/com/unciv/ui/newgamescreen/MapParametersTable.kt
index 27067635ba..4d4fe6e358 100644
--- a/core/src/com/unciv/ui/newgamescreen/MapParametersTable.kt
+++ b/core/src/com/unciv/ui/newgamescreen/MapParametersTable.kt
@@ -76,6 +76,7 @@ class MapParametersTable(
             MapType.fourCorners,
             MapType.perlin,
             MapType.archipelago,
+            MapType.innerSea,
             if (isEmptyMapAllowed) MapType.empty else null
         )