Fixed sector damage calculations / Campaign balance

core/src/mindustry/content/TechTree.java

@@ -484,6 +484,7 @@ public class TechTree implements ContentList{
                                                 new Research(bryde),
                                                 new Research(spectre),
                                                 new Research(launchPad),
+                                                new Research(massDriver),
                                                 new Research(impactReactor),
                                                 new Research(additiveReconstructor),
                                                 new Research(exponentialReconstructor)

core/src/mindustry/content/UnitTypes.java

@@ -1413,12 +1413,12 @@ public class UnitTypes implements ContentList{
                 ejectEffect = Fx.casing1;
                 shootSound = Sounds.missile;
                 bullet = new MissileBulletType(2.7f, 12, "missile"){{
+                    keepVelocity = true;
                     width = 8f;
                     height = 8f;
                     shrinkY = 0f;
                     drag = -0.003f;
                     homingRange = 60f;
-                    keepVelocity = false;
                     splashDamageRadius = 25f;
                     splashDamage = 10f;
                     lifetime = 80f;