Unlock core units on respawn

core/src/mindustry/content/UnitTypes.java

@@ -1697,6 +1697,7 @@ public class UnitTypes implements ContentList{
             engineOffset = 6f;
             hitSize = 8f;
             commandLimit = 3;
+            alwaysUnlocked = true;
 
             weapons.add(new Weapon("small-basic-weapon"){{
                 reload = 17f;

core/src/mindustry/world/blocks/storage/CoreBlock.java

@@ -6,6 +6,7 @@ import arc.graphics.g2d.*;
 import arc.math.*;
 import arc.math.geom.*;
 import arc.struct.*;
+import mindustry.*;
 import mindustry.annotations.Annotations.*;
 import mindustry.content.*;
 import mindustry.core.*;
@@ -71,6 +72,10 @@ public class CoreBlock extends StorageBlock{
             unit.spawnedByCore(true);
             unit.add();
         }
+
+        if(state.isCampaign() && player == Vars.player){
+            block.unitType.unlock();
+        }
     }
 
     @Override