diff --git a/core/assets/maps/split.msav b/core/assets/maps/split.msav
new file mode 100644
index 0000000000..41af95da13
Binary files /dev/null and b/core/assets/maps/split.msav differ
diff --git a/core/assets/maps/three.msav b/core/assets/maps/three.msav
index 745a45b268..6f132415a6 100644
Binary files a/core/assets/maps/three.msav and b/core/assets/maps/three.msav differ
diff --git a/core/assets/maps/two.msav b/core/assets/maps/two.msav
index 9ab26b37ba..05b048c870 100644
Binary files a/core/assets/maps/two.msav and b/core/assets/maps/two.msav differ
diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index 759fb8e3e2..9ed219f616 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -100,10 +100,10 @@ public class ErekirTechTree{
                     });
                 });
 
-                node(reinforcedPayloadConveyor, Seq.with(new OnSector(four)), () -> {
+                node(reinforcedPayloadConveyor, Seq.with(new OnSector(atlas)), () -> {
                     //TODO should only be unlocked in unit sector
-                    node(constructor, Seq.with(new Research(siliconArcFurnace), new OnSector(four)), () -> {
-                        node(payloadMassDriver, Seq.with(new OnSector(four)), () -> {
+                    node(constructor, Seq.with(new Research(siliconArcFurnace), new OnSector(split)), () -> {
+                        node(payloadMassDriver, Seq.with(new OnSector(split)), () -> {
                             //TODO further limitations
                             node(payloadLoader, () -> {
                                 node(payloadUnloader, () -> {
@@ -189,7 +189,7 @@ public class ErekirTechTree{
 
                 node(cliffCrusher, () -> {
                     node(siliconArcFurnace, () -> {
-                        node(electrolyzer, Seq.with(new OnSector(three)), () -> {
+                        node(electrolyzer, Seq.with(new OnSector(atlas)), () -> {
                             node(oxidationChamber, Seq.with(new Research(tankRefabricator), new OnSector(four)), () -> {
                                 node(electricHeater, Seq.with(new OnSector(four)), () -> {
                                     node(heatRedirector, () -> {
@@ -257,7 +257,7 @@ public class ErekirTechTree{
                     });
                 });
 
-                node(diffuse, Seq.with(new OnSector(two)), () -> {
+                node(diffuse, Seq.with(new OnSector(lake)), () -> {
                     node(sublimate, () -> {
                         node(titan, Seq.with(new OnSector(four)), () -> {
                             node(afflict, Seq.with(new OnSector(four)), () -> {
@@ -296,7 +296,7 @@ public class ErekirTechTree{
                     node(mechFabricator, Seq.with(new OnSector(three)), () -> {
                         node(UnitTypes.merui);
 
-                        node(tankRefabricator, Seq.with(new OnSector(three)), () -> {
+                        node(tankRefabricator, Seq.with(new OnSector(atlas)), () -> {
                             node(UnitTypes.locus);
 
                             node(mechRefabricator, Seq.with(new OnSector(three)), () -> {
@@ -350,8 +350,14 @@ public class ErekirTechTree{
                     });
 
                     node(three, Seq.with(new SectorComplete(two), new SectorComplete(lake), new Research(ventCondenser), new Research(shipFabricator)), () -> {
-                        node(four, Seq.with(new SectorComplete(three)), () -> {
+                        node(atlas, Seq.with(new SectorComplete(three), new Research(mechFabricator)), () -> {
+                            node(split, Seq.with(new SectorComplete(atlas), new Research(payloadConveyor)), () -> {
 
+                            });
+
+                            node(four, Seq.with(new SectorComplete(three)), () -> {
+
+                            });
                         });
                     });
                 });
diff --git a/core/src/mindustry/content/SectorPresets.java b/core/src/mindustry/content/SectorPresets.java
index 808306fc02..a63946070f 100644
--- a/core/src/mindustry/content/SectorPresets.java
+++ b/core/src/mindustry/content/SectorPresets.java
@@ -16,8 +16,7 @@ public class SectorPresets{
     impact0078, desolateRift, nuclearComplex, planetaryTerminal,
     coastline, navalFortress,
 
-    onset, two, lake, three, four
-    ;
+    onset, two, lake, three, four, atlas, split;
 
     public static void load(){
         //region serpulo
@@ -209,6 +208,14 @@ public class SectorPresets{
             captureWave = 9;
         }};
 
+        atlas = new SectorPreset("atlas", erekir, 14){{ //TODO random sector, pick a better one
+            difficulty = 5;
+        }};
+
+        split = new SectorPreset("split", erekir, 19){{ //TODO random sector, pick a better one
+            difficulty = 5;
+        }};
+
         four = new SectorPreset("four", erekir, 29){{
             difficulty = 6;