He looked down at the gear that the Engineer had salvaged from the dig. It was amazing how much destructive power the Ancients could pack into something so small. He oiled the barrels of the gun, loaded the rockets in their launchers and strapped them down to his back. He lit his cigar and strode towards the battlefield. Let those demons have their electricians - they don't stand a chance against this new breed of soldiers raining death from above - Artillery!
Target a direction to channel, firing a barrage of rockets over the duration hitting the first enemy they touch. Consumes 4 mana per rocket fired. Each rocket deals 12 + 7/14/21/28% of your Attack Damage in Physical Damage in a 200 radius on impact. (50% to non-hero units).
Each charge grants 1 rocket, with a max of 20 charges. Charges are refreshed every 0.5s, even while channeling.
Activate mid-channel to Turn toward your cursor while firing your LRM.
Shoot first, aim later!
Notes
LRM has a 0.25 second delay before firing. While channeling, a rocket is fired every 0.15 seconds.
Missiles do not travel in a perfectly straight line, and arc slightly left or right and end in approximately at the center of your line of fire at its maximum range.
Missiles have a touch radius of 60 and deal damage in a 200 radius on impact or expiration.
Damage dealt from each rocket scales down linearly over 200 units, based on the distance from the unit hit by the rocket.
Missiles reach their maximum distance over 0.6 seconds.
With 20 charges stored, you can fire up to 29 missiles per cast.
Turn
[ Q ]
Cast Time: 0 / 0 seconds
Target Cursor
Activate to turn while firing your LRM
Cooldown: 0.2 seconds
Activate to turn toward your cursor while firing your LRM.
Mortar Strike
[ W ]
Cast Time: 0.3 / 0.4 seconds
Target Position
Type - Magic
Artillery lobs a mortar into the air dealing damage and slowing enemies in a large area.
Range: 1200 Radius: 400 Mana Cost: 75 Cooldown: 20/18/16/14 seconds
Lobs a mortar at target area, impacting after a 1.5 second delay. Targets in radius take 100/140/180/220 Magic Damage and have Mortar Shot applied for 4 seconds.
Can be activated while channeling.
Fireworks went wrong.
Mortar Shot Effects
15% Movement Slow
Special Ammunition
[ E ]
Passive
Artillery passively gains an increase of Cast Range and an added Slow to all abilities.
Your abilities have an increased 200/400/600/800 Cast Range and applies Special Ammunition to enemies hit for 3 seconds.
Special Ammunition Effects
15% Movement Slow
Homing Missile
[ R ]
Cast Time: 0.3 / 0.7 seconds
Target Unit
Enemy Units
Type - Magic
Launch a tactical missile to seek out and destroy your foes!
Target an enemy to launch a missile at them. The missile starts out slow but accelerates rapidly towards the target. On impact, deals 200/250/300 Magic Damage and stuns for up to 4 seconds in a 225/250/275 radius area around the target.
Stun duration is calculated by a base of 1 second + 0.1 second for every 100 units the missile has traveled.
Increases cast range, lowers cooldown and allows you to target an area to fire up 2 missiles.
I think this one likes you!
Notes
Missile speed starts at 100 initially and accelerates by 150 per second.
While the missile is traveling to its target, a visual marker will appear on the target. This marker can only be seen by allies.
Reduces the cooldown by 20 seconds and increases cast range by 500. Changes the ability to target an area (300 radius). Shoots up to 2 missiles at enemies in the target area. Prioritises heroes and enemies closest to the center of the target location.
Target a direction to channel, firing a barrage of rockets over the duration hitting the first enemy they touch.
Consumes 4 mana per rocket fired. Each rocket deals [12 + 7/14/21/28% of your Attack Damage] in Physical Damage in a 200 radius on impact, plus a bonus 1% Damage Multiplier for each rocket fired after the first in a given channel instance.
Deals half the damage to non-hero units.
Each charge grants 1 rocket, with a max of 20 charges. Charges are refreshed every 0.5s, even while channeling.
Activate mid-channel to Turn toward your cursor while firing your LRM.
Passively grants Artillery a 20% chance to fire a 20/40/60/80 Magic Damage missile at enemies which slows their Movement Speed by 15% for 1 second whenever he deals non-DoT Damage.
Can not affect the same unit more than once a second.
The chance is doubled if the target is stunned or has the Mortar Strike slow.
Homing Missile: Now single target ability that will follow its target no matter what. On impact, deals 200/250/300 Magic damage and stuns for a duration determined by how far the missile has traveled, up to a max of 4 seconds
Artillery lobs a mortar into the air dealing damage and slowing enemies in a large area.
Range: 1400 Radius: 350 Mana Cost: 75 Cooldown: 15 seconds
Lobs a mortar at target area, impacting after a 1.5 second delay. Targets in radius take 60/120/180/240 Magic Damage and receive a stacking 15% Movement Speed slow for 3 seconds.
Fires an additional mini-mortar for each enemy hero in radius at 0.5 second intervals, up to a max of 5. Mini-mortars deal 20/30/40/50 Magic Damage and apply the slow as well.
Fireworks went wrong.
Notes
Can cast while channeling.
Mini-mortars land in the same position as the main mortar.
Mini-mortars have a radius of 350 as well.
Precision Targeting Protocols
[ E ]
Passive
Passively grants Artillery a 20% chance to fire a 20/40/60/80 Magic Damage missile at enemies that slows their movement speed by 15% for 1 second whenever he deals non-DoT damage.
This chance is doubled if the target is stunned or has the Mortar Strike slow.
Same unit cannot be affected more than once every second.
Target a location to charge up for 0.25 seconds then fire missiles at the location for 4 seconds. Fires 4 missiles per second that deal 15 plus 7/14/21/28% of attack damage in Physical Damage and travel 1500 units.
Activate again to Turn toward your cursor while firing your LRM.
Fragmentation Shells
[ W ]
Passive
Attacks and LRM hits slows your enemies.
Passively adds a stacking 7% Movement Speed Slow to your attacks and LRM hits for 3 seconds. Stacks up to 2/3/4/5 times.
Grants Artillery bonus attack damage and range in an area.
Radius: 300 Mana Cost: 10 Cooldown: 10 seconds
Activate to place a 350 radius ring on the ground for 8 seconds. When you are within the ring you gain a bonus 5/15/25/35% Base Damage and 100/150/200/250 Range. May be cast while channeling.
Heavy Artillery was originally intended to be the default Artillery and the current Artillery as the EA Avatar, but was changed due to community feedback.
Artillery's lore was also changed on release. Below is the original teaser lore:
The engineer looked at his masterpiece. The turrets were mounted, the rockets loaded, the cannons oiled and tested on the range. It was time to test his mechanical beast against the demonic hoards of the Hellbourne. They would know no quarter when he found them within range and death reigned down from above. The explosions deafened both man and beast, and Artillery stood alone among the craters and carnage.
Legion
Staff of the Master effect added.
Artillery will no longer be available in PBT
LRM
Mortar Shot
Special Ammunition
Homing Missile
Artillery Barrage.
Bunker Down Completely reworked. Now called 
