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This page relates to a Metal Slug Attack unit; for information about this boss in the main series, see The Union.

MSAUnitSilver
MSAUnit Union
Union
Rarity
MSA rarity Super Rare
Faction
MSD faction Rebel Army 24px Rebel Army
AP cost
MSA dot III 2,000
MSA dot IV 1,800
MSA dot V 1,600
Optimal range
Short (united, Unit 01)
Medium (divided, Unit 02 and 03)
Traits
Stun
Knockback
Suicide Attack
Critical
Piercing
Playable since
1.15.0
In-Game Description
"A weapon built in secret on Scrap Island by the Morden Army. Splits up and reassembles at will while it attacks."
Animms7uniontank

The Union is a playable unit in Metal Slug Attack, first unlockable via the Extra Ops titled "Agent Sally". It also appears as the daily boss in Attack! mode every Wednesday (or Tuesday, in lagging time zones).

A slow and expensive unit, the Union deploys using an invulnerable "merged" form, but then later disassembles into the three segments so as to attack; a Head Tank (No. 1), a V.T.O.L Gunship (No. 2), and a Slave Tank (No. 3). The Head focuses on melee, while the Gunship and Slave use ranged attacks (firing piercing energy balls from exposed "cores"). Each performs a suicide attack if destroyed.

The skills of the Union compliment each section separately: the first grants No. 1 knock back, the second bestows No. 2 with criticals, and the third allows No. 3 to stun enemies. MSA Skill small + 4 simply boosts the health of all segments.

When in the same deck with the Scrap Cannon, their AP costs are lowered by 10%, as a part of the "Scrap Island" team bonus.

Attacks

All of the Union's attacks are listed as "Divide", since they are attached together. This does not apply once they divide.

Close Range

Attribute pistol Ram (unnamed, Spread) The Head Tank (No. 1) rams enemies with its tracks.

Long Range

Attribute pistol Energy Projectiles (unnamed, Spread) The V.T.O.L Gunship (No. 2) and Slave Tank (No. 3) attack the enemy with energy projectiles.

Special

Attribute pistol Unison Fire (unnamed, Spread) All parts of the Union fire in unison: No. 1 fires heavy missiles, No. 2 fires a machine gun salvo, and No. 3 rains down parachute bombs.

Note

  • With 1 MSA Skill small + unlocked, Unit 1's attacks have a chance of knockback
  • With 2 MSA Skill small + unlocked, Unit 2's attacks have a chance of dealing critical hits.
  • With 3 MSA Skill small + unlocked, Unit 3's attacks have a chance of stunning the enemy.

Stats

Health Attribute Resistance
Lvl MSA dot I MSA dot II MSA dot III MSA dot IV MSA dot V Attribute pistol
Kinetic
MSA resistance 2-Normal Normal
1 25000 27500 30250 33275 36602
10 37500 41250 45375 49912 54903 Attribute grenade
Explosive
MSA resistance 2-Normal Normal
20 50000 55000 60500 66550 73205
30 62500 68750 75625 83187 91506 Attribute fire
Incendiary
MSA resistance 2-Normal Normal
40 75000 82500 90750 99825 109807
50 87500 96250 105875 116462 128108 * HP might be increased by skills / items or buffs

Skills

MSA item I Gnome Bullet MSA item I Bomb MSA item I Frog MSA Skill small + Unit 1 Charge

If all of Unit 1's attacks hit, there is a 10% (+0.5% each level) that the enemy will be knocked back.

MSA item III Drop Bomb MSA item III Drop Bomb MSA item I Chinese Cabbage

MSA item II Heavy Machine Gun MSA item II Grenade MSA item I Battery MSA Skill small + Unit 2 Link

If all of Unit 2's attacks hit, there is a 10% (+0.5% each level) chance of a critical hit.

MSA item III Drop Bomb MSA item III Drop Bomb MSA item I Banana

MSA item III Enemy Chaser MSA item III Mine MSA item II Diploma MSA Skill small + Unit 3 Link

If all of Unit 3's attacks hit, there is a 10% (+0.5% each level) chance of stunning the enemy.

MSA item IV Unit 1 Armor MSA item IV Unit 1 Armor MSA item II Apple

MSA item IV Big Heavy Machine Gun MSA item IV Red Pepper MSA item III Heart Key MSA Skill small + All-Around Armor

HP will increase by (20%, +1% each level).

MSA item V Unit 2 Vulcan Cannon MSA item V Unit 2 Vulcan Cannon MSA item III Fruit

MSA item V Two Machine Guns MSA item V Battery MSA item IV Magic Lamp
MSA item V Unit 3 Core MSA item V Unit 3 Core MSA item IV Pig

Gallery

Metal Slug Attack Units
MSA faction Regular Army Soldier | Utan | Marco | Tarma | Hyakutaro | 7000000taro | Eri | Fio | Nadia | SV-Camel | Ostrich Slug | Slugnoid | 6000000taro | Trevor | 8000000taro | Fio(Monkey) | Nadia(Monkey) | Marco(Monkey) | Trevor(Monkey) | Walter Rian | Tyra Elson | Pocket Marco | Trevor (Mummy) | Fat Tarma | Slug Mobile | Donkey Slug | Motorbike P.O.W. | Motorbike P.O.W. Ver.2 | Fat Eri | Bradley | Zombie Eri | Donkey Slug (Eri) | Fat Marco | Fat Fio | Anna Wiese | Snowwoman Nadia | Red Eye | Gimlet | Roberto Nicola | Ostrich Slug (Clark) | Slugnoid Type-B | Drill Slug | Zombie Nadia | Zombie Fio | Everlasting Summer Nadia | Special Trevor | Alisa Stewart | Nathalie Neo | Drill Slug Ver.2 | Slug Copter | Airbone Metal Claw | Slugnoid Type-Ikari | Zombie Tarma | Zombie Trevor | Metal Claw | SV-001 Experimental | SV-001 | Slug Armor | Everlasting Summer Rumi | Everlasting Summer Madoka | Protogunner | Elephant Slug | Special Eri | Everlasting Summer Eri | Christmas Eri | Everlasting Summer Fio | Special Nadia | Whip | Valentine Nadia | Leona | "Cat Ears" Leona | Clark | Ralf | Rumi Aikawa | Christmas Fio | MS-Alice | MSA (Marco) | Zombie Marco | Midori | SV-001 Type-R(Marco) | Madoka Aikawa | Jet Clark | Crazy Ralf | Lightning Fio | Slug Flyer | Slug Gunner | Regular Army Helicopter | Heidern | Augensterm | Elephant Slug (Battery) | Deformed Slug Gunner | Super Devil Tarma | Super Devil Marco | Super Devil Eri | Slug Gigant | Slug Gigant MK II | Rootmars Slug
MSA faction Rebel Army Rebel Infantry | Bazooka Soldier | Shielded Soldier | Rebel Rifleman | Paratrooper | Bikers | Rocket Bomb Soldier | Mortar | Arabian Soldier | Girida-O | F.Rebel Infantry | Gatling Soldier | LV Armor | MH-6 s | M-15A Bradley | Iron Iso | Di-Cokka | Arabian Fighter | Rebel Infantry (Wrath) | W.Soldier | Mortar (Wrath) | Bazooka Soldier(Wrath) | Rebel Rifleman(Wrath) | Camel Rider | Flying Tara+ | Bodyguard (Rebel Infantry) | Bodyguard (Shielded Soldier) | Abul Abbas | Bodyguard (Rebel Rifleman) | Shielded Soldier(Wrath) | Dararin Dara Dara | MH-6 s Ver.F | Patrol Robot+ | Eaca-B | Scrap Cannon | Patrol Robot | Iron Iso II | Rebel Walker | Balor | Nop-03 Sarubia | Regimental MH-6 s | Girida-O Ver.F | Morden Bus | T-2B Melty Honey | Airborne Melty Honey | Elite Arabian Soldier | Big Gate | R-Shobu | R-Shobu Ver.F | R.R-Shobu | Subway | Everlasting Summer Abigail | Special Beatriz | Everlasting Summer Beatriz | Allen O'Neil | Formor | Parachuetruck | Mini Jupiter King | Vita | Navy | Gen.Morden Ver.Di-Cokka | Nova | Shoe | Karn | Destrade | Beatriz | Abigail | Iron Nokana | Hairbuster Riberts | Jupiter King MK II | Allen Jr. | Spacey Nokana | Iron Nokana MK II | Allen O'Neil (Wrath) | Hi-Do | The Keesi II | The Keesi III | Iron Vermilion | Emain Macha | Drache Macha | Tiger Macha | Jupiter King | Big Shiee | Dragon Nosuke+ | Bull Drill | Sergeant Drill | Rebel Gigant MK II | Iron Cab | Red Devil Morden | Hodumi+ | Crablops Type-F | Assy Nero | Rebel Gigant | Tani Oh | Donald Morden | Iron Sentinel | Crablops | Cabrakan | Kraken | Union
MSA faction Ptolemaic Army Guerrilla | Bazooka Guerrilla | Shielded Guerrilla | Guerrilla Mortar | Sniper | Special Force | Special Force (Rider) | Hover Units | Girida-O Ver. P.M. | Di-Cokka Ver. P.M. | Gunner Unit | MG Unit | Claw Unit | Flying Tara Ver. P.M. | Custom Vehicle | Hover Vehicle | A.P.C. (Special Force) | MH-6 s VER(P.M) | Guerrilla (Captain) | Sarubia II Ver.P.M | Ptolemaic Slug EX | Masked Soldier | Masked Soldier (Curse) | Special Caroline | Elite Hover Unit | Commander | Bradley Ver. P.M. | Sarubia Ver. P.M. | Special Dragunov | Ptolemaic Slug | Commander (Navy) | Black Hound | Everlasting Summer Dragunov | R-Shobu Ver. P.M. | Everlasting Summer Yoshino | Sisilia | Yoshino | Caroline | Veronica | Dragunov | Augensterm Ver(P.M) | Caro's Augensterm | Jupiter Queen (P.M.) | Metal Rear | Metal Rear EX | Deep Sand Marine | Sand Marine | Ptolemaios (Curse) | Emerald Turtle | Stone Turtle | Ptolemaios
MSA faction Aliens Zombie (Woman) | Zombie (Man) | Zombie (Fattish Man) | Hopper Mecha | Scientist (Zombie) | Zombie (Rebel Soldier) | Flying Parasite | Mars People | Mini U.F.O. | Invader | Hunter Walker | Mars People Pocket | Clone Eri | UFO Invader | Tar Man | Mars People Cadre | Halloween People | Vanguard(Type-A) | Ring Laser Mecha | Smasher | Lydia | Golden Hunter Walker | Tar Man (Red) | Tiny UFO Type:A | Flying Core | Mars People (Neo) | Mars People Elite | Clone Fio | Clone Fio (Zombie) | Winged Invader | Party People Elite | Ring Laser Mecha(Red) | Crab-Tank | Mars Mecha | Dai-Manji | Monoeye | Professor | Percier | Dark Monoeye | Odette | Annette | Clone Abby | Mars Professor | Vanguard | Brain Robot | Mars Brain Robot | Monoeye UFO | Rugname | Rootmars | Rugname X
MSA faction Independent Pirate Soldier | Chariot | Samurai Infantry | Chowmein-Conga | Bat | Native | Native (Bird) | Hazmat Soldier | Mutated Soldier | Man Eater | Sasquatch | Halloween Soldier | Japonese Assault Force | Samurai Tanks | Dog Mummy | Mummy | Hunged Mummy | Maggot | Huge Locust | Flying Killers | Samurai Plane | Amadeus Robot | Mini Hermit | Researcher | Pirate Assault Soldier | Pirate Soldier(Ghost) | Amadeus Soldier (Shield) | Samurai Infantry (Wrath) | Big Snail | Dangling Snail | Amadeus Corporal | Mummy Cat | Hazmat Soldier(Green) | Mini Caterpillar | Bear | Mummy Generator(Mummy Cat) | Lovely Mummy | Di-Cokka(Amadeus) | Special Amundsen | Ohumein-Conga(Green) | Ohumein-Conga (Red) | Skull Snail | Slug Armor ver.yagami | Slug Armor ver.kusanagi | Dangling Huge Ivy | Mummy (Awakening) | Huge Ivy | Vatn | Morden Robot | Red Goblin | Scotia Amundsen | El Dorado | Mummy Warrior | Aileen | Esther | Elysion | Jin | Aswang | Cleopatra | Giant Caterpillar | Mecha Allen | Iron | White Baby (Prototype) | Doctor(Brave Guerrier) | Big John | Jade John | Hi-Do(Amadeus) | Huge Hermit | Skull Hermit | Prototype Iron | Pharaoh's Arc | Tyrant Pharaoh | Sol Dae Rokker | Toschka Dalanue | Ghost Shiee | Amadeus Type:γ | Amadeus Type:α | Sol Dae Rokker (Anima)

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