diff --git a/core/assets/bundles/bundle.properties b/core/assets/bundles/bundle.properties
index 42255737bb..7146a525af 100644
--- a/core/assets/bundles/bundle.properties
+++ b/core/assets/bundles/bundle.properties
@@ -672,6 +672,8 @@ sector.extractionOutpost.description = A remote outpost, constructed by the enem
 sector.impact0078.description = Here lie remnants of the interstellar transport vessel that first entered this system.\n\nSalvage as much as possible from the wreckage. Research any intact technology.
 sector.planetaryTerminal.description = The final target.\n\nThis coastal base contains a structure capable of launching Cores to local planets. It is extremely well guarded.\n\nProduce naval units. Eliminate the enemy as quickly as possible. Research the launch structure.
 
+sector.onset.name = Onset
+
 status.burning.name = Burning
 status.freezing.name = Freezing
 status.wet.name = Wet
diff --git a/core/assets/maps/onset.msav b/core/assets/maps/onset.msav
new file mode 100644
index 0000000000..7ff136da92
Binary files /dev/null and b/core/assets/maps/onset.msav differ
diff --git a/core/src/mindustry/content/SectorPresets.java b/core/src/mindustry/content/SectorPresets.java
index 46e5acb258..91be446053 100644
--- a/core/src/mindustry/content/SectorPresets.java
+++ b/core/src/mindustry/content/SectorPresets.java
@@ -112,12 +112,11 @@ public class SectorPresets{
         //endregion
         //region erekir
 
-        /*
-        onset = new SectorPreset("onset", erekir, 15){{
+        onset = new SectorPreset("onset", erekir, 10){{
             addStartingItems = true;
             captureWave = 10;
             difficulty = 1;
-        }};*/
+        }};
 
         //endreigon
     }
diff --git a/core/src/mindustry/world/Tiles.java b/core/src/mindustry/world/Tiles.java
index 6aac9c6ec4..5f7b9d533f 100644
--- a/core/src/mindustry/world/Tiles.java
+++ b/core/src/mindustry/world/Tiles.java
@@ -39,7 +39,7 @@ public class Tiles implements Iterable<Tile>{
         array[y*width + x] = tile;
     }
 
-    /** set a tile at a raw array position; does not range-check. use with caution. */
+    /** set a tile at a raw array position; used for fast iteration / 1-D for-loops */
     public void seti(int i, Tile tile){
         array[i] = tile;
     }