Added self-destruct bullet property

core/src/mindustry/entities/bullet/BulletType.java

@@ -39,6 +39,8 @@ public abstract class BulletType extends Content{
     public float reloadMultiplier = 1f;
     /** Recoil from shooter entities. */
     public float recoil;
+    /** Whether to kill the shooter when this is shot. For suicide bombers. */
+    public boolean killShooter;
 
     public float splashDamage = 0f;
     /** Knockback in velocity. */
@@ -146,6 +148,9 @@ public abstract class BulletType extends Content{
     }
 
     public void init(Bullet b){
+        if(killShooter && b.getOwner() instanceof HealthTrait){
+            ((HealthTrait)b.getOwner()).kill();
+        }
     }
 
     public void update(Bullet b){

core/src/mindustry/entities/traits/HealthTrait.java

@@ -14,6 +14,11 @@ public interface HealthTrait{
 
     void setDead(boolean dead);
 
+    default void kill(){
+        health(-1);
+        damage(1);
+    }
+
     default void onHit(SolidTrait entity){
     }
 

core/src/mindustry/entities/type/Unit.java

@@ -185,11 +185,6 @@ public abstract class Unit extends DestructibleEntity implements SaveTrait, Targ
         y = Mathf.clamp(y, 0, world.height() * tilesize - tilesize);
     }
 
-    public void kill(){
-        health = -1;
-        damage(1);
-    }
-
     public boolean isImmune(StatusEffect effect){
         return false;
     }