Steam achievement for killing a unit with a mass driver

core/src/mindustry/service/Achievement.java

@@ -67,6 +67,7 @@ public enum Achievement{
 
     have10mItems(SStat.totalCampaignItems, 10_000_000),
     killEclipseDuo,
+    killMassDriver,
 
     completeErekir,
     completeSerpulo,

core/src/mindustry/service/GameService.java

@@ -5,6 +5,7 @@ import arc.struct.*;
 import arc.util.*;
 import mindustry.*;
 import mindustry.content.*;
+import mindustry.entities.bullet.*;
 import mindustry.game.EventType.*;
 import mindustry.game.SectorInfo.*;
 import mindustry.gen.*;
@@ -394,6 +395,10 @@ public class GameService{
                 if(e.unit.type == UnitTypes.eclipse && e.bullet.owner instanceof TurretBuild turret && turret.block == Blocks.duo){
                     killEclipseDuo.complete();
                 }
+
+                if(e.bullet.type instanceof MassDriverBolt){
+                    killMassDriver.complete();
+                }
             }
         });