Engineering bay

The engineering bay

The engineering bay is a terran building used to improve the quality of weapons and armor fielded by infantry. They were in use by the Terran Confederacy as early as 2488.

Overview

Within the Dominion Armed Forces, whenever a strike force is deployed planetside, the engineering bay is one of two key research facilities to be established in a field base as soon as possible (the other being the armory), improving the quality of infantry weapons. During the Great War, these structures were equipped with the ability to lift off and move to a new location. However, after the Brood War, the engineering capabilities were improved, increasing the personnel of the structure and intricacy of their work. Because of this, engineering bays were no longer cleared for flight.

The Dominion Special Forces utilize AIs in their experimental engineering bays, which increase their research speed by fighting each other in simulated battles. Meanwhile, a portion of the Knights of Tyradors engineering bays are utilized in researching new amusement park attractions, though this was temporarily suspended after the Battle of Tyrador IX.

Game Structure

StarCraft

Engineering Bay
Structure
Race	Terran
Role	Infantry research center
Production
Minerals	125
Build time	60
Produced from	SCV
Requires	Command center
Protection
Hit points	850
Armor	1
Function
Allows	Missile turret
Research	Infantry Weapons Infantry Armor

The engineering bay upgrades the quality of weapons and armor used by terran infantry. It can lift off.

Researched Upgrades

Infantry Weapons

• +1 bonus per attack per level for ghosts, and marines.
• +2 bonus per attack per level for firebats.

Acquisition
Purchased from Engineering bay Hotkey W Level 1 Cost 100 100 267 Level 2 Cost 175 175 300 Required Science facility Level 3 Cost 250 250 333 Required Science facility

Infantry Armor

• +1 upgrade to armor per level for SCVs, marines, firebats, ghosts, and medics.

Acquisition
Purchased from Engineering bay Hotkey A Level 1 Cost 100 100 267 Level 2 Cost 175 175 300 Required Science facility Level 3 Cost 250 250 333 Required Science facility

v • e

Building Abilities

Lift Off

This structure can lift off, enabling it to fly. It cannot produce units or conduct research while in flight, and must leave add-ons behind.

Usage
Hotkey L

Development

The weapons plant

The weapons plant was a terran structure in the StarCraft beta. It was cancelled before the game's full release. It was later turned into the engineering bay.

StarCraft II

Engineering Bay
Structure
Race	Terran
Role	Infantry and building research center
Production
Minerals	125
Build time	35
Produced from	SCV Dominion laborer (Co-op Mengsk)
Requires	Command center Enlistment center (Co-op Mengsk)
Hotkey	E
Protection
Hit points	850 Mastery: +17 hp per Structure Health mastery point. Up to a maximum 1360 (Co-op Swann) 1700 (Co-op Nova)
Armor	1 (+2 with Neosteel Armor)
Type	Mechanical Structure
Armor type	Armored
Function
Allows	Planetary fortress Missile turret Sensor tower Auto-turret (Co-op Tychus) Earthsplitter ordnance (Co-op Mengsk)
Research	See below

Versus

The engineering bay reappears in StarCraft II. It can no longer lift off.

Infantry Weapons

• +1 damage for marines and reapers
• +1 base damage and +1 bonus damage for marauders and ghosts

Acquisition
Purchased from Engineering bay Hotkey E Level 1 Cost 100 100 114 Level 2 Cost 150 150 136 Required Armory Level 3 Cost 200 200 157 Required Armory

v • e

Infantry Armor

• +1 to armor for SCVs, marines, firebats. marauders, medics, reapers, spectres, and ghosts.

Acquisition
Purchased from Engineering bay Hotkey A Level 1 Cost 100 100 114 Level 2 Cost 155 1755 136 Required Armory Level 3 Cost 200 200 157 Required Armory

v • e

Hi-Sec Auto Tracking

Increases the attack range of automated defenses: missile turrets, auto-turrets, point defense drones, and the planetary fortress by +1.

Acquisition
Purchased from Engineering bay Hotkey H Cost 100 100 57

v • e

Neosteel Armor

Upgrades the armor of structures by 2 (excluding auto-turrets). Increases the cargo space of bunkers by 2. Also provides extra cargo space for command centers and planetary fortresses.

Acquisition
Purchased from Engineering bay Hotkey B Cost 100 100 100

v • e

Wings of Liberty

In the Wings of Liberty single player campaign, the Hi-Sec Auto Tracking and Building Armor upgrades are not available, while the Neosteel Frame upgrade to bunkers is an upgrade purchased in the Hyperion's armory.

Ultra Capacitors Attack upgrades improve attack cooldown of affected units by 5% per level. These self-replicating ultra capacitors reduce the reload time of weapons and systems. Now each of the weapon upgrades at the armory and engineering bay increases attack speed by 5% in addition to increasing damage. Campaign Acquisition Wings of Liberty Acquired from Hyperion laboratory for 5 protoss research points v • e

Vanadium Plating Armor upgrades increase health of affected units by 5% per level. We have created a new lightweight alloy called vanadium. Vanadium diffuses weapon impacts much more efficiently than traditional armor plating, and it better preserves the life of our units. Now each of the armor upgrades in the armory and engineering bay increases unit life by 5% in addition to increasing armor. Campaign Acquisition Wings of Liberty Acquired from Hyperion laboratory for 5 protoss research points v • e

Fire Suppression System

All structures repair themselves to 50% life. All structure fires are automatically put out.

This all-in-one safety system automatically dispatches robotic drones to put out any fires and perform basic repairs on damaged structures. Although these drones are effective at doing basic repairs, they do not have a strong enough AI to perform the more delicate repairs needed to restore a structure past half life.

Campaign Acquisition
Wings of Liberty Unlock Complete 12 missions. Acquired from Hyperion armory for $90,000

v • e

Co-op Missions

The building is available to Jim Raynor, Rory Swann, Nova Terra, Mira Han and Matt Horner, Tychus Findlay, and Arcturus Mengsk, however each variant has unique upgrades available for research.

Notably Swann and Han and Horner's engineering bays do not give them infantry weapon or armor upgrades; the building gives Swann defensive turret and building upgrades only, while Han and Horner gets special upgrades for Mira's infantry units instead. Han and Horner weapon and armor upgrades are provided at their armory instead. Alexei Stukov has access to a infested engineering bay which can upgrades infested infantry and infested bunkers.

Raynor Upgrades

Terran Infantry Weapons

Increases the attack damage of terran infantry.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey E Level 1 Cost 100 100 Mastery: -2 -2 per Research Resource Cost mastery point. Down to a maximum 40 40 160 Level 2 Cost 175 175 Mastery: -3.5 -3.5 per Research Resource Cost mastery point. Down to a maximum 70 70 190 Level 3 Cost 250 250 Mastery: -5 -5 per Research Resource Cost mastery point. Down to a maximum 100 100 220

v • e

Terran Infantry Armor

Increases the armor of terran infantry.

Vanadium Plating: Increases the life of terran infantry by 10% per level.

Backwater Marshall: The increase of life for terran infantry go up, from 10% per level to 20% per level.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey A Level 1 Cost 100 100 Mastery: -2 -2 per Research Resource Cost mastery point. Down to a maximum 40 40 160 Level 2 Cost 175 175 Mastery: -3.5 -3.5 per Research Resource Cost mastery point. Down to a maximum 70 70 190 Level 3 Cost 250 250 Mastery: -5 -5 per Research Resource Cost mastery point. Down to a maximum 100 100 220

v • e

Neosteel Frame

Bunkers gain +2 capacity and command centers gain +5 capacity.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey N Cost 100 Mastery: -2 per Research Resource Cost mastery point. Down to a minimum 40 100 Mastery: -2 per Research Resource Cost mastery point. Down to a minimum 40 60

v • e

Structure Armor

All structures gain +2 armor.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey B Cost 100 Mastery: -2 per Research Resource Cost mastery point. Down to a minimum 40 100 Mastery: -2 per Research Resource Cost mastery point. Down to a minimum 40 60

v • e

Swann Upgrades

Hi-Sec Auto Tracking

All turrets gain +1 attack range.

Grease Monkey: All turrets gain +2 attack range.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey N Cost 100 100 60

v • e

Structure Armor

All structures gain +2 armor.

Grease Monkey: All turrets gain +4 armor.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey B Cost 100 100 60

v • e

Fire Supression Systems

All buildings will initiate auto-repairs when below 50% health, repairing them back to 50% health (restore 15 hit points per second).

Usage
Passive

Campaign Acquisition
Unlock Reach Swann Level 11

Acquisition
Purchased from Engineering bay Hotkey F Cost 100 100 60

v • e

KMC Auto-Loaders

Increases the attack speed of all turrets by 25%.

Grease Monkey: Increases the attack speed of all turrets by 50%.

Usage
Passive

Campaign Acquisition
Unlock Reach Swann Level 11

Acquisition
Purchased from Engineering bay Hotkey R Cost 150 150 90

v • e

Nova Upgrades

Terran Infantry Weapons

Increases the attack damage of terran infantry.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey E Level 1 Cost 100 100 160 Level 2 Cost 175 175 190 Level 3 Cost 250 250 220

v • e

Terran Infantry Armor

Increases the armor of terran infantry.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey A Level 1 Cost 100 100 160 Level 2 Cost 175 175 190 Level 3 Cost 250 250 220

v • e

Structure Armor

All structures gain +2 armor.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey B Cost 100 100 60

v • e

Han and Horner Upgrades

LD9 Cluster Charges

Reduces the cooldown of Reapers KD8 Charge by 10. When Reapers are killed, they throw 8 grenades at the killing unit, deals 5 damage per each grenade.

Stronger Death Chance Mastery: When Reapers are killed, they throw 15 grenades at the killing unit, deals 5 damage per each grenade with a 2% chance per mastery point.

Chaotic Power Couple: Increases the damage dealt by grenades from slain Reapers from 5 to 10.

Usage
Passive Range 6.5 Notes Mastery: +2% chance per Stronger Death Chance mastery point. Up to a maximum 60% chance Slain Reaper throws grenades at the killing unit in the following sequence: 1 below the enemy, 7 around him, and 7 more along a wide radius circle (it throws last 7 grenades, if the Stronger Death Effect Chance is triggered). Each grenade deals damage within a radius 1.5.

Acquisition
Purchased from Engineering bay Hotkey B Basic Cost 50 50 60 With Impatience Cost 50 50 42

v • e

Jet Pack Overdrive

Increases the movement speed of Reapers, and grants them the ability to fly for 10 seconds. Reapers are able to attack air units while flying.

Usage
Hotkey F Duration 10 Cooldown 20

Campaign Acquisition
Acquired from Reach Han and Horner Level 4

Acquisition
Purchased from Engineering bay Hotkey F Basic Cost 100 100 90 With Impatience Cost 100 100 63

v • e

Executioner Missile

Reduces Sentinel Missile cooldown by 20 seconds. When Widow Mines are destroyed, they launch 5 Sentinel Missiles at random nearby targets (within a radius of 5.5) that deal 10 (20 vs. Shields) area damage (radius 2.625).

Stronger Death Chance Mastery: When Widow Mines are destroyed, they launch 10 Sentinel Missiles at random nearby targets (within a radius of 5.5) that deal 10 (20 vs. Shields) area damage (radius 2.625) with a 2% chance per mastery point.

Chaotic Power Couple: Increases the damage dealt by Sentinel Missiles from destroyed Widow Mines from 10 (20 vs. Shields) to 20 (30 vs. Shields).

Usage
Notes Mastery: +2% chance per Stronger Death Chance: mastery point. Up to a maximum 60% chance

Acquisition
Purchased from Engineering bay Hotkey D Basic Cost 50 50 60 With Impatience Cost 50 50 42

v • e

Black Market Launchers

Sentinel missile range is increased by 50%, and Widow Mines can burrow and unburrow much faster.

Campaign Acquisition
Acquired from Reach Han and Horner Level 4

Acquisition
Purchased from Engineering bay Hotkey R Basic Cost 100 100 90 With Impatience Cost 100 100 63

v • e

Aerosol Stim Emitters

Hellions and Hellbats transform 75% faster. When Hellions are killed, nearby allied units in a radius of 3.5 gain 25% movement and 15% attack speed for 15 seconds.

Stronger Death Chance Mastery: When Hellions are killed, nearby allied units in a radius of 3.5 gain 50% movement and 30% attack speed for 15 seconds with a 2% chance per mastery point.

Chaotic Power Couple: Increases the Aerosol Stim Emitters movement and attack speed bonuses from 25% and 15% (50% and 30% with Stronger Death Chance Mastery) respectively to 50% and 30% (100% and 60% with Stronger Death Chance Mastery) respectively.

Usage
Duration 15 Notes Mastery: +2% chance per Stronger Death Chance: mastery point. Up to a maximum 60% chance.

Acquisition
Purchased from Engineering bay Hotkey A Basic Cost 50 50 60 With Impatience Cost 50 50 42

v • e

Tar Bomb

Hellions can launch a bomb that deals 20 damage to the target unit. Nearby enemies have their movement speed reduced by 75% and attack range reduced by 3 for 5 seconds. Can be set to autocast.

Usage
Duration 5 Cooldown 10

Campaign Acquisition
Acquired from Reach Horner and Han Level 9

Acquisition
Purchased from Engineering bay Hotkey E Basic Cost 100 100 90 With Impatience Cost 100 100 63

v • e

Wildfire Explosives

Hellbat movement speed is increased by 50%. When Hellbats are killed, they ignite the surrounding area (radius 4). Enemies in the fire run around in fear for 3 seconds.

Stronger Death Chance Mastery: When Hellbats are killed, they ignite the surrounding area (radius 5.66) with a 2% chance per mastery point. Enemies in the fire run around in fear for 3 seconds.

Chaotic Power Couple: The duration of the Hellbat death effect is increased by 100%.

Usage
Duration 3 6 (with Chaotic Power Couple) Notes Mastery: +2% chance per Stronger Death Chance: mastery point. Up to a maximum 60% chance

Acquisition
Purchased from Engineering bay Hotkey H Basic Cost 50 50 60 With Impatience Cost 50 50 42

v • e

Immolation Fluid

Hellbat attacks cause enemies to burn for an additional 50 damage over 5 seconds.

Usage
Passive

Campaign Acquisition
Unlock Reach Han & Horner Level 9 Notes Hellion and Hellbat Upgrade Cache

Acquisition
Purchased from Engineering bay Hotkey T Basic Cost 100 100 90 With Impatience Cost 100 100 63

v • e

Tychus Upgrades

Outlaw Weapons

Increases the attack damage of Tychus and his Outlaws.

Usage
Passive

Campaign Acquisition
Unlock Level 1-3 – Initially available. Level 4-5 – Reach Tychus Level 13.

Acquisition
Purchased from Engineering bay Hotkey E Level 1 Cost 100 100 120 Level 2 Cost 175 175 140 Level 3 Cost 250 250 160 Level 4 Cost 325 325 180 Level 5 Cost 400 400 200

v • e

Outlaw Life and Armor

Increases the armor of Tychus and his Outlaws and increases their life by 10%.

(Affects SCVs)

Usage
Passive

Campaign Acquisition
Unlock Level 1-3 – Initially available. Level 4-5 – Reach Tychus Level 13.

Acquisition
Purchased from Engineering bay Hotkey A Level 1 Cost 100 100 120 Level 2 Cost 175 175 140 Level 3 Cost 250 250 160 Level 4 Cost 325 325 180 Level 5 Cost 400 400 200

v • e

ITC-E Triggers

Increases the attack speed of Tychus, Crooked Sam, and Sirius by 25%.

Usage
Notes Mastery: +0.5% attack speed per Tri-Outlaw Research Improvement mastery point. Up to a maximum 40% attack speed

Campaign Acquisition
Unlock Reach Tychus Level 5.

Acquisition
Purchased from Engineering bay Hotkey S Cost 150 150 90

v • e

Endurance Supplements

Increases the life of Blaze, Cannonball and Rattlesnake by 25%.

Usage
Notes Mastery: +0.5% life per Tri-Outlaw Research Improvement mastery point. Up to a maximum 40% life

Campaign Acquisition
Unlock Reach Tychus Level 5.

Acquisition
Purchased from Engineering bay Hotkey G Cost 150 150 90

v • e

Flashforce GDM Visor

Provides Vega, Nux, and Lt. Nikara with Detection, allowing them to see cloaked and burrowed enemy units.

Usage
Notes Mastery: +0.5% sight and detection range per Tri-Outlaw Research Improvement mastery point. Up to a maximum +15% sight and detection range

Campaign Acquisition
Unlock Initially available

Acquisition
Purchased from Engineering bay Hotkey C Cost 75 75 120 Effect Sight and Detection Range: 10 Mastery: +0.05 sight and detection range per Tri-Outlaw Research Improvement mastery point. Up to a maximum 11.5

v • e

Big Red Button

Calls down a Nuclear Strike at a target location. Nukes take 3 seconds to land, but they deal up to 1000 damage in a large area. Replaces Barrage.

Dutiful Dogwalker: Big Red Button is unavailable.

Usage
Hotkey Q Range 15 Duration 3

Campaign Acquisition
Unlock Reach Tychus Level 15.

Acquisition
Purchased from Engineering bay Hotkey R Cost 200 200 90

v • e

Mengsk Upgrades

Dominion Weapons

Increases the attack damage of Dominion Troopers and Enthralled Zerg.

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey E Level 1 Cost 100 100 160 Level 2 Cost 150 150 190 Required Armory Level 3 Cost 200 200 220 Required Armory

v • e

Dominion Armor

Increases the armor of Dominion Troopers and Enthralled Zerg.

(Affects Imperial Intercessor and Imperial Witness)

Usage
Passive

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey A Level 1 Cost 100 100 160 Level 2 Cost 150 150 190 Required Armory Level 3 Cost 200 200 220 Required Armory

v • e

Orbital Trooper Pods

Laborers and Troopers are delivered directly to the Enlistment Center's Rally Points.

Usage
Cost 3

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey D Cost 100 100 60

v • e

Neosteel Fortified Armor

Increases the life and armor of Supply Bunkers, Missile Turrets and Earthsplitter Ordnances by +200 and +2 respectively.

Campaign Acquisition
Unlock Initially available.

Acquisition
Purchased from Engineering bay Hotkey S Cost 100 100 60

v • e

Aim-assist Embrasures

Further increases the range of units within Supply Bunkers by 1.

Campaign Acquisition
Unlock Reach Mengsk Level 6.

Acquisition
Purchased from Engineering bay Hotkey S Cost 100 100 60

v • e

Hemispheric Accelerants

Increases the range of the Earthsplitter Ordnance's Bombardment ability by 25.

Usage
Passive

Campaign Acquisition
Unlock Reach Mengsk Level 6.

Acquisition
Purchased from Engineering bay Hotkey B Cost 150 150 90

v • e

Development

As of patch 4.7.1, Neosteel Frame and Structure Armor were merged into an upgrade called Neosteel Armor.

The StarCraft II engineering bay was designed to be a more simple structure than its predecessor. It was decided to make it a grounded structure as per the belief that only unit-producing structures should be able to lift off.

Images

Covert Ops engineering bay (Nova Covert Ops campaign)

Nova Co-op Missions engineering bay

Dominion Special Forces engineering bay (Versus)

Mira's Marauders engineering bay

Heavens' Devils engineering bay

Royal Guard engineering bay

Knights of Tyrador engineering bay

SC1 building wireframe

SC Remastered building wireframe

References

Terran Units and Structures of StarCraft/Brood War v • e

Infantry SCV Marine Firebat Medic (BW) Ghost Ground vehicles Vulture Goliath Siege tank Air units Wraith Dropship Valkyrie (BW) Science vessel Battlecruiser Basic buildings Command center ComSat station Nuclear silo Supply depot Engineering bay Barracks Refinery Missile turret Academy Bunker Advanced buildings Factory Machine shop Armory Starport Control tower Science facility Physics lab Covert ops Other Nuclear missile Spider mine Scrapped units Cargo ship Merc biker Mercenary gunship Raider Spysat Scrapped buildings Cantina Dry docks Power station Repair bay Star base

Terran Units and Structures of StarCraft II v • e

Versus Units and Structures Infantry SCV Marine Reaper Marauder Ghost Terrestrial Vehicles MULE Hellion Hellbat (HotS) Siege tank Cyclone (LotV) Thor Widow mine (HotS) Aerospace Vessels Viking Medivac dropship Banshee Raven Battlecruiser Liberator (LotV) Spawned Units MULE Drop pod Nuclear missile Basic Buildings Command center Refinery Supply depot Barracks Engineering bay Automated Defenses Auto-turret Missile turret Point defense drone Repair drone Support Buildings Orbital command Planetary fortress Sensor tower Bunker Add-ons Tech lab Reactor Advanced Buildings Ghost academy Factory Armory Starport Fusion core Campaign and Co-op Missions Units and Structures Mercenaries Devil Dogs Hammer Securities Siege Breakers Spartan Company War Pigs Hel's Angels Dusk Wings Jackson's Revenge Dominion Elite Guard Sons of Korhal Prometheus Company Death Head Aegis Guard Field Response Theta Outback Hunter Bulwark Company Shock Division Blackhammer Sky Fury Squadron Night Wolves Winged Nightmare Pride of Augustgrad Valor of Vardona Infantry Firebat HERC Medic Rebel Spectre Trooper Terrestrial Vehicles Armored personnel carrier Diamondback Goliath Militarized transport Predator Sensor drone Vulture Warhound Aerospace Vessels Asteria wraith Assault galleon Hercules dropship Science vessel Harvester Special ops dropship Sonar drone Sovereign battlecruiser Strike fighter Tac fighter Theia raven Valkyrie Wraith Spawned units A.R.E.S. Bio-mechanical repair drone Advanced Buildings Dominion starport HERC compound Merc compound Shadow ops Add-ons Tech reactor Support Buildings Laser drill Hive mind emulator Psi disrupter Nuclear silo Strike fighter platform Automated defenses Devastation turret Gun turret Flame turret Perdition turret Sentry gun Shrike turret Spider mine Cerberus mine Canceled Terran Units and Structures of StarCraft II v • e Scrapped Removed Units Anti-air walker Block B Bulwark D-8 charges Genetic knight Guardian Gundam HERC Hercules tank Incinerator Laser drill tank Mine drone Missile launcher Nomad Pillager Predator Prison infantry guard Quantradyne APOD-33 dropship Raider Ranger Red Adder Scavenger Scout Shredder Super crane Targeting drone Valkyrie Zeus battle tank Zeus lander Removed Buildings Drop pod facility Gun platform Listening post Munitions depot Radar tower Star base