diff --git a/core/assets-raw/sprites/ui/icons/icon-tree.png b/core/assets-raw/sprites/ui/icons/icon-tree.png
new file mode 100644
index 0000000000..6e28a70c13
Binary files /dev/null and b/core/assets-raw/sprites/ui/icons/icon-tree.png differ
diff --git a/core/assets/bundles/bundle.properties b/core/assets/bundles/bundle.properties
index 59c7a938af..61430ed9ab 100644
--- a/core/assets/bundles/bundle.properties
+++ b/core/assets/bundles/bundle.properties
@@ -52,6 +52,7 @@ noname = Pick a[accent] player name[] first.
 filename = File Name:
 unlocked = New content unlocked!
 completed = [accent]Completed
+techtree = Tech Tree
 research = Research
 researched = [LIGHT_GRAY]{0} researched.
 players = {0} players online
diff --git a/core/assets/sprites/sprites.atlas b/core/assets/sprites/sprites.atlas
index c6df5e5165..17a44cdfe0 100644
--- a/core/assets/sprites/sprites.atlas
+++ b/core/assets/sprites/sprites.atlas
@@ -2764,7 +2764,7 @@ bullet-back
   index: -1
 casing
   rotate: false
-  xy: 1135, 907
+  xy: 847, 891
   size: 8, 16
   orig: 8, 16
   offset: 0, 0
@@ -2834,7 +2834,7 @@ laserfull
   index: -1
 minelaser
   rotate: false
-  xy: 2041, 1233
+  xy: 847, 841
   size: 4, 48
   orig: 4, 48
   offset: 0, 0
@@ -2925,7 +2925,7 @@ shot
   index: -1
 transfer
   rotate: false
-  xy: 2041, 1183
+  xy: 847, 791
   size: 4, 48
   orig: 4, 48
   offset: 0, 0
@@ -8784,21 +8784,21 @@ icon-production
   index: -1
 icon-turret
   rotate: false
-  xy: 786, 837
+  xy: 919, 1005
   size: 16, 16
   orig: 16, 16
   offset: 0, 0
   index: -1
 icon-units
   rotate: false
-  xy: 993, 919
+  xy: 960, 11
   size: 16, 16
   orig: 16, 16
   offset: 0, 0
   index: -1
 icon-upgrade
   rotate: false
-  xy: 1011, 911
+  xy: 1029, 911
   size: 16, 16
   orig: 16, 16
   offset: 0, 0
@@ -9155,7 +9155,7 @@ icon-line
   index: -1
 icon-link
   rotate: false
-  xy: 1047, 913
+  xy: 1065, 913
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
@@ -9169,7 +9169,7 @@ icon-liquid-small
   index: -1
 icon-load
   rotate: false
-  xy: 1063, 913
+  xy: 1081, 913
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
@@ -9204,14 +9204,14 @@ icon-locked
   index: -1
 icon-logic
   rotate: false
-  xy: 907, 913
+  xy: 923, 913
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-map
   rotate: false
-  xy: 1079, 913
+  xy: 1097, 913
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
@@ -9246,28 +9246,28 @@ icon-mission-background
   index: -1
 icon-mission-battle
   rotate: false
-  xy: 919, 913
+  xy: 618, 1832
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-mission-defense
   rotate: false
-  xy: 618, 1832
+  xy: 1113, 913
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-mission-done
   rotate: false
-  xy: 210, 4
+  xy: 1125, 913
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-none
   rotate: false
-  xy: 222, 4
+  xy: 210, 4
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
@@ -9281,7 +9281,7 @@ icon-paste
   index: -1
 icon-pause
   rotate: false
-  xy: 234, 4
+  xy: 222, 4
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
@@ -9295,7 +9295,7 @@ icon-pencil
   index: -1
 icon-pencil-small
   rotate: false
-  xy: 1095, 913
+  xy: 795, 919
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
@@ -9309,35 +9309,35 @@ icon-pick
   index: -1
 icon-play
   rotate: false
-  xy: 246, 4
+  xy: 234, 4
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-play-2
   rotate: false
-  xy: 795, 919
+  xy: 795, 903
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-players
   rotate: false
-  xy: 636, 1840
+  xy: 246, 4
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-power-small
   rotate: false
-  xy: 1111, 913
+  xy: 636, 1840
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-quit
   rotate: false
-  xy: 795, 903
+  xy: 811, 925
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
@@ -9351,14 +9351,14 @@ icon-redo
   index: -1
 icon-refresh
   rotate: false
-  xy: 811, 925
+  xy: 827, 925
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-rename
   rotate: false
-  xy: 827, 925
+  xy: 811, 909
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
@@ -9372,35 +9372,35 @@ icon-resize
   index: -1
 icon-rotate
   rotate: false
-  xy: 811, 909
+  xy: 843, 925
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-rotate-arrow
   rotate: false
-  xy: 843, 925
+  xy: 827, 909
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-rotate-left
   rotate: false
-  xy: 827, 909
+  xy: 859, 925
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-rotate-right
   rotate: false
-  xy: 859, 925
+  xy: 843, 909
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-save
   rotate: false
-  xy: 843, 909
+  xy: 875, 925
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
@@ -9421,7 +9421,7 @@ icon-save-map
   index: -1
 icon-settings
   rotate: false
-  xy: 1123, 913
+  xy: 811, 897
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
@@ -9435,28 +9435,28 @@ icon-terrain
   index: -1
 icon-tools
   rotate: false
-  xy: 875, 925
+  xy: 859, 909
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-touch
   rotate: false
-  xy: 811, 897
+  xy: 823, 897
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-touchDelete
   rotate: false
-  xy: 823, 897
+  xy: 835, 897
   size: 10, 10
   orig: 10, 10
   offset: 0, 0
   index: -1
 icon-trash
   rotate: false
-  xy: 859, 909
+  xy: 891, 925
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
@@ -9468,6 +9468,13 @@ icon-trash-16
   orig: 16, 16
   offset: 0, 0
   index: -1
+icon-tree
+  rotate: false
+  xy: 786, 837
+  size: 16, 16
+  orig: 16, 16
+  offset: 0, 0
+  index: -1
 icon-tree-locked
   rotate: false
   xy: 305, 77
@@ -9477,56 +9484,56 @@ icon-tree-locked
   index: -1
 icon-trello
   rotate: false
-  xy: 891, 925
+  xy: 875, 909
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-tutorial
   rotate: false
-  xy: 875, 909
+  xy: 907, 925
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-undo
   rotate: false
-  xy: 919, 1005
+  xy: 993, 919
   size: 16, 16
   orig: 16, 16
   offset: 0, 0
   index: -1
 icon-unlocked
   rotate: false
-  xy: 960, 11
+  xy: 1011, 911
   size: 16, 16
   orig: 16, 16
   offset: 0, 0
   index: -1
 icon-unlocks
   rotate: false
-  xy: 907, 925
+  xy: 891, 909
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-wiki
   rotate: false
-  xy: 891, 909
+  xy: 923, 925
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
   index: -1
 icon-zoom
   rotate: false
-  xy: 1029, 911
+  xy: 1047, 911
   size: 16, 16
   orig: 16, 16
   offset: 0, 0
   index: -1
 icon-zoom-small
   rotate: false
-  xy: 923, 925
+  xy: 907, 909
   size: 14, 14
   orig: 14, 14
   offset: 0, 0
diff --git a/core/assets/sprites/sprites.png b/core/assets/sprites/sprites.png
index 32800c6137..f9bbf107f7 100644
Binary files a/core/assets/sprites/sprites.png and b/core/assets/sprites/sprites.png differ
diff --git a/core/src/io/anuke/mindustry/type/Zone.java b/core/src/io/anuke/mindustry/type/Zone.java
index 18c95b84f7..8bbeaaeb4d 100644
--- a/core/src/io/anuke/mindustry/type/Zone.java
+++ b/core/src/io/anuke/mindustry/type/Zone.java
@@ -7,6 +7,7 @@ import io.anuke.arc.scene.ui.layout.Table;
 import io.anuke.mindustry.game.Rules;
 import io.anuke.mindustry.game.UnlockableContent;
 import io.anuke.mindustry.maps.generators.Generator;
+import io.anuke.mindustry.world.Block;
 
 import static io.anuke.mindustry.Vars.state;
 
@@ -15,6 +16,8 @@ public class Zone extends UnlockableContent{
     public final Generator generator;
     public ItemStack[] deployCost = {};
     public ItemStack[] startingItems = {};
+    public Block[] blockRequirements = {};
+    public ItemStack[] itemRequirements = {};
     public Supplier<Rules> rules = Rules::new;
     public boolean alwaysUnlocked;
     public int conditionWave = Integer.MAX_VALUE;
diff --git a/core/src/io/anuke/mindustry/ui/dialogs/AboutDialog.java b/core/src/io/anuke/mindustry/ui/dialogs/AboutDialog.java
index cf77e3f0cd..a10edecfa0 100644
--- a/core/src/io/anuke/mindustry/ui/dialogs/AboutDialog.java
+++ b/core/src/io/anuke/mindustry/ui/dialogs/AboutDialog.java
@@ -48,7 +48,7 @@ public class AboutDialog extends FloatingDialog{
                 continue;
             }
 
-            Table table = new Table("underline-2");
+            Table table = new Table("underline");
             table.margin(0);
             table.table(img -> {
                 img.addImage("white").height(h - 5).width(40f).color(link.color);
diff --git a/core/src/io/anuke/mindustry/ui/dialogs/DeployDialog.java b/core/src/io/anuke/mindustry/ui/dialogs/DeployDialog.java
index 052be7517a..d4c6effa9e 100644
--- a/core/src/io/anuke/mindustry/ui/dialogs/DeployDialog.java
+++ b/core/src/io/anuke/mindustry/ui/dialogs/DeployDialog.java
@@ -26,7 +26,7 @@ public class DeployDialog extends FloatingDialog{
         cont.clear();
 
         addCloseButton();
-        buttons.addButton("$techtree", () -> ui.tech.show()).size(200f, 60f);
+        buttons.addImageTextButton("$techtree", "icon-tree", 16 * 2, () -> ui.tech.show()).size(230f, 64f);
 
         cont.stack(new Table(){{
             top().left().margin(10);
diff --git a/core/src/io/anuke/mindustry/ui/dialogs/TechTreeDialog.java b/core/src/io/anuke/mindustry/ui/dialogs/TechTreeDialog.java
index 7a208f28c2..3055d221e5 100644
--- a/core/src/io/anuke/mindustry/ui/dialogs/TechTreeDialog.java
+++ b/core/src/io/anuke/mindustry/ui/dialogs/TechTreeDialog.java
@@ -5,10 +5,10 @@ import io.anuke.arc.collection.Array;
 import io.anuke.arc.collection.ObjectSet;
 import io.anuke.arc.graphics.Color;
 import io.anuke.arc.graphics.g2d.Lines;
-import io.anuke.arc.graphics.g2d.ScissorStack;
 import io.anuke.arc.input.KeyCode;
 import io.anuke.arc.math.Interpolation;
 import io.anuke.arc.math.geom.Rectangle;
+import io.anuke.arc.scene.Element;
 import io.anuke.arc.scene.Group;
 import io.anuke.arc.scene.actions.Actions;
 import io.anuke.arc.scene.event.InputEvent;
@@ -36,10 +36,11 @@ public class TechTreeDialog extends FloatingDialog{
     private ObjectSet<TechTreeNode> nodes = new ObjectSet<>();
     private TechTreeNode root = new TechTreeNode(TechTree.root, null);
     private static final float nodeSize = 60f;
-    private int toasts;
 
     public TechTreeDialog(){
-        super("$techtree");
+        super("");
+
+        cont.setFillParent(true);
 
         TreeLayout layout = new TreeLayout();
         layout.gapBetweenLevels = 60f;
@@ -67,6 +68,11 @@ public class TechTreeDialog extends FloatingDialog{
         addCloseButton();
     }
 
+    @Override
+    protected void drawBackground(float x, float y){
+        drawDefaultBackground(x, y);
+    }
+
     void checkNodes(TechTreeNode node){
         boolean locked = locked(node);
         if(!locked) node.visible = true;
@@ -78,14 +84,24 @@ public class TechTreeDialog extends FloatingDialog{
     }
 
     void showToast(String info){
-        toasts ++;
-        int t = toasts;
+        int maxIndex = 0;
+
+        for(Element e : Core.scene.root.getChildren()){
+            if("toast".equals(e.getName())){
+                maxIndex = Math.max(maxIndex, (Integer)e.getUserObject() + 1);
+            }
+        }
+
+        int m = maxIndex;
+
         Table table = new Table();
-        table.actions(Actions.fadeOut(7f, Interpolation.fade), Actions.run(() -> toasts --), Actions.removeActor());
+        table.actions(Actions.fadeOut(7f, Interpolation.fade), Actions.removeActor());
         table.top().add(info);
+        table.setName("toast");
+        table.setUserObject(maxIndex);
         table.update(() -> {
             table.toFront();
-            table.setPosition(Core.graphics.getWidth()/2f, Core.graphics.getHeight() - 21 - t*20f, Align.top);
+            table.setPosition(Core.graphics.getWidth()/2f, Core.graphics.getHeight() - 21 - m*20f, Align.top);
         });
         Core.scene.add(table);
     }
@@ -117,7 +133,7 @@ public class TechTreeDialog extends FloatingDialog{
     }
 
     class View extends Group{
-        float panX = 0, panY = 0;
+        float panX = 0, panY = -200;
         boolean moved = false;
         Rectangle clip = new Rectangle();
         ImageButton hoverNode;
@@ -253,10 +269,6 @@ public class TechTreeDialog extends FloatingDialog{
 
         @Override
         public void draw(){
-            if(!ScissorStack.pushScissors(clip.set(x, y, width, height))){
-                return;
-            }
-
             float offsetX = panX + width/2f + x, offsetY = panY + height/2f + y;
 
             for(TreeNode node : nodes){
@@ -268,8 +280,6 @@ public class TechTreeDialog extends FloatingDialog{
             }
 
             super.draw();
-
-            ScissorStack.popScissors();
         }
     }
 }