Index: binaries/data/mods/public/simulation/components/Attack.js
===================================================================
--- binaries/data/mods/public/simulation/components/Attack.js
+++ binaries/data/mods/public/simulation/components/Attack.js
@@ -461,6 +461,12 @@
 	return attackBonus;
 };
 
+// Calculate the elevation damage multiplier
+Attack.prototype.GetElevationBonus = function(type, elevationDifference)
+{
+	return Math.max(0.1, 1 + 0.01 * (elevationDifference + (this.template[type].ElevationBonus || 0)));
+};
+
 /**
  * Attack the target entity. This should only be called after a successful range check,
  * and should only be called after GetTimers().repeat msec has passed since the last
@@ -501,7 +507,7 @@
 
 		// Add inaccuracy based on spread.
 		let distanceModifiedSpread = ApplyValueModificationsToEntity("Attack/Ranged/Spread", +this.template.Ranged.Spread, this.entity) *
-			targetPosition.horizDistanceTo(selfPosition) / 100;
+			predictedPosition.horizDistanceTo(selfPosition) / 100;
 
 		let randNorm = randomNormal2D();
 		let offsetX = randNorm[0] * distanceModifiedSpread;
@@ -509,6 +515,8 @@
 
 		let realTargetPosition = new Vector3D(predictedPosition.x + offsetX, targetPosition.y, predictedPosition.z + offsetZ);
 
+		let elevationDifference = selfPosition.y - realTargetPosition.y;
+
 		// Recalculate when the missile will hit the target position.
 		let realHorizDistance = realTargetPosition.horizDistanceTo(selfPosition);
 		timeToTarget = realHorizDistance / horizSpeed;
@@ -528,7 +536,7 @@
 			"position": realTargetPosition,
 			"direction": missileDirection,
 			"projectileId": id,
-			"multiplier": this.GetAttackBonus(type, target),
+			"multiplier": this.GetAttackBonus(type, target) * this.GetElevationBonus(type, elevationDifference),
 			"isSplash": false,
 			"attackerOwner": attackerOwner
 		};
Index: binaries/data/mods/public/simulation/components/Damage.js
===================================================================
--- binaries/data/mods/public/simulation/components/Damage.js
+++ binaries/data/mods/public/simulation/components/Damage.js
@@ -117,6 +117,7 @@
 			"radius": data.radius,
 			"shape": data.shape,
 			"strengths": data.splashStrengths,
+			"multiplier": data.multiplier,
 			"direction": data.direction,
 			"playersToDamage": this.GetPlayersToDamage(data.attackerOwner, data.friendlyFire),
 			"type": data.type,
@@ -215,7 +216,7 @@
 			"strengths": data.strengths,
 			"target": ent,
 			"attacker": data.attacker,
-			"multiplier": damageMultiplier,
+			"multiplier": data.multiplier * damageMultiplier,
 			"type": data.type + ".Splash",
 			"attackerOwner": data.attackerOwner
 		});
Index: binaries/data/mods/public/simulation/components/tests/test_Damage.js
===================================================================
--- binaries/data/mods/public/simulation/components/tests/test_Damage.js
+++ binaries/data/mods/public/simulation/components/tests/test_Damage.js
@@ -155,6 +155,7 @@
 		"radius": 10,
 		"shape": "Linear",
 		"strengths": { "hack" : 100, "pierce" : 0, "crush": 0 },
+		"multiplier": 1,
 		"direction": new Vector3D(1, 747, 0),
 		"playersToDamage": [2],
 		"type": "Ranged",