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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! every Wednesday (or Tuesday, in lagging time zones). Parts can be obtained through Another Story.

A fairly 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 (No. 1) specializes in melee attacks. The V.T.O.L Gunship (No. 2) specializes in ranged attacks. The Slave Tank (No. 3) uses both ranged and melee, though it primarily uses ranged attacks.

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, they form the "Scrap Island" team, lowering their AP costs by 10%.

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 (Spread) - The Head Tank (No. 1) rams enemies with its tracks. Slave Tank also performs this attack if there is an enemy within melee distance.

Long Range

Attribute pistol Energy Projectiles (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 (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

Trivia

  • The Union is the most expensive unit in-game. It requires significantly more MSP than any other unit, and possesses the most expensive unit-exclusive items.
Metal Slug Attack Units
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MSA faction Rebel Army Rebel Infantry | Di-Cokka | Nop-03 Sarubia | Karn | Shielded Soldier | Allen O'Neil | T-2B Melty Honey | LV Armor | M-15A Bradley | Rebel Rifleman | Bazooka Soldier | Gatling Soldier | Girida-O | Donald Morden | Shoe | Iron Iso | Iron Nokana | R-Shobu | Hi-Do | Rocket Bomb Soldier | Mortar | Jupiter King | Hairbuster Riberts | Bikers | Patrol Robot | Paratrooper | Rebel Gigant | MH-6 s | The Keesi II | Regimental MH-6 s | Mini Jupiter King | Jupiter King MK II | Airborne Melty Honey | Iron Sentinel | Big Shiee | Arabian Fighter | Arabian Soldier | Camel Rider | Abul Abbas | F.Rebel Infantry | Assy Nero | Kraken | Bull Drill | R-Shobu Ver.F | MH-6 s Ver.F | Crablops | Gen.Morden Ver.Di-Cokka | Allen Jr. | Cabrakan | The Keesi III | Formor | Abigail | Emain Macha | Subway | Allen O'Neil (Wrath) | Union | Scrap Cannon | Elite Arabian Soldier | Tani Oh | Iron Nokana MK II | W.Soldier | Bodyguard (Rebel Infantry) | Bodyguard (Shielded Soldier) | Bodyguard (Rebel Rifleman) | Beatriz | Iron Cab | Eaca-B | R.R-Shobu | Vita | Rebel Infantry (Wrath) | Red Devil Morden | Parachuetruck | Sergeant Drill | Balor | Mortar (Wrath) | Spacey Nokana | Rebel Gigant MK II | Iron Iso II | Iron Vermilion | Dararin Dara Dara | Navy | Special Beatriz | Flying Tara+ | Hodumi+ | Girida-O Ver.F | Nova | Big Gate | Crablops Type-F | Rebel Walker | Everlasting Summer Abigail | Everlasting Summer Beatriz | Drache Macha | Rebel Rifleman(Wrath) | Bazooka Soldier(Wrath) | Shielded Soldier(Wrath) | Tiger Macha | Morden Bus | Destrade | Dragon Nosuke+ | Patrol Robot+ | Shizuka | Special Abul Abbas | Rapid | Special Vita | Huracan | Assy Nero MKII | Elite Arabian Fighter | Elite Arabian Camel Rider | Aisha | Shoe MK II | Karn MK II | Cabrakan MK II | Cabrakan Pod (Individual) | Tani Oh MK II | Di-Cokka MK II | Special Allen Jr. | The Keesi III+ | Formor+ | Julia | Kraken MK II | F.Bazooka Soldier | Chloe | Christmas Nova | Golden Morden | Golden Bikers | Izabella | Special Navy | Golden Nosuke | Golden LV Armor | Frozen Cab | Bodyguard(Rocket Bomb Soldier) | Rogue Gigant | Gatling Soldier(Wrath) | Sister Nokana | Bodyguard(Mortar) | Golden Jupiter | Golden Iso | Grazia | Special Destrade | Red Sergeant Drill | Nop-03 Sarubia MK II | Loretta | Special Huracan | Hi-Do MKII | Girida-O MKII | Big Shiee MKII | Scrap Cannon MKII | Edda | Special Aisha | Cabrakan MK III | T-2B Melty Honey MK II | Dion | Special Izabella | Sky Jupiter King | Mini Jupiter King MK II | Norah | Everlasting Summer Nova | Hairbuster Riberts MK II | Dararin Dara Dara MK II | Emma | Special Shizuka | Golden Nokana | Golden Di-Cokka | K-O3 Coupled Armored Vehicle | Anti Air-Craft | Vicky | Halloween Beatriz | Crablops Type-Lower | Rebel Walker MK II | Abigail (Subjugation Tactics) | Special Chloe
MSA faction Ptolemaic Army Hover Units | Guerrilla | Special Force | Gunner Unit | Shielded Guerrilla | Bazooka Guerrilla | Metal Rear | Sniper | Claw Unit | Girida-O Ver. P.M. | Di-Cokka Ver. P.M. | Special Force (Rider) | Black Hound | Sarubia Ver. P.M. | Ptolemaic Slug | Guerrilla Mortar | Stone Turtle | Bradley Ver. P.M. | R-Shobu Ver. P.M. | MG Unit | Commander | Hover Vehicle | Ptolemaios | Masked Soldier | Dragunov | Flying Tara Ver. P.M. | Sand Marine | A.P.C. (Special Force) | Yoshino | Elite Hover Unit | Caroline | Jupiter Queen (P.M.) | MH-6 s VER(P.M) | Augensterm Ver(P.M) | Ptolemaios (Curse) | Masked Soldier (Curse) | Guerrilla (Captain) | Metal Rear EX | Ptolemaic Slug EX | Special Dragunov | Veronica | Special Caroline | Emerald Turtle | Commander (Navy) | Sisilia | Everlasting Summer Yoshino | Deep Sand Marine | Everlasting Summer Dragunov | Sarubia II Ver.P.M | Caro's Augensterm | Custom Vehicle | Towa | ShootingRay | Union 03 Ver.P.M | Elite Sniper | Mira | Halloween Caroline | Ptolemaios (Abyss) | Gunner Unit(Abyss) | Simon | Special Sisilia | Anastasia IV | Miharu | Christmas Veronica | Union 01 Ver.P.M | Black Hound Type-R | Chunyan | Believer (Master) | Believer (Elite) | Believer (Soldier) | Space Metal Rear | Space MG Unit | Owen | Special Mira | Union 02 Ver.P.M | Special Force (Rope) | Dragunov Ver.Rebellion | Special Towa | Golden Sand Marine | Golden Claw Unit | Sho | Special Yoshino | ShootingRay Ver.Rebellion | Bradley Ver.Rebellion | Maria | Everlasting Summer Miharu | Towa's Augensterm | Girida-O Ver.P.M + | Beecham | Special Chunyan | Golden Turtle | Golden Elite Hover Unit | Damian | Halloween Simon | Land Blowfish | Shielded Guerrilla (Captain)
MSA faction Aliens Mars People | Zombie (Woman) | Hopper Mecha | Mars Mecha | Zombie (Fattish Man) | Zombie (Rebel Soldier) | Tar Man | Ring Laser Mecha | Zombie (Man) | Monoeye | Clone Fio (Zombie) | Clone Eri | Mini U.F.O. | Scientist (Zombie) | Smasher | Crab-Tank | Vanguard | Invader | Hunter Walker | Brain Robot | Dai-Manji | Winged Invader | Mars People Cadre | Rugname | Flying Core | Professor | Tar Man (Red) | UFO Invader | Flying Parasite | Rootmars | Halloween People | Odette | Golden Hunter Walker | Mars People Pocket | Party People Elite | Dark Monoeye | Mars People Elite | Rugname X | Mars Brain Robot | Ring Laser Mecha(Red) | Mars People (Neo) | Annette | Vanguard(Type-A) | Lydia | Mars Professor | Tiny UFO Type:A | Percier | Clone Fio | Monoeye UFO | Clone Abby | Nowan | Everlasting Summer Odette | Dai-Manji (Secret Ver.) | Mini U.F.O. (Secret Ver.) | Halloween Percier | Mars People Officer | Clone Tarma | Clone Betty | Mars People Tank | Mars People Attacker | Mars People Healer | Schwarz Metzelei | Christmas Annette | Rootmars X | Party People X | Ariadna | Special Professor | Fedeln Metzelei | Special Nowan | Cocoon Betty | Ring Laser Mecha(Blue) | Rillacle | Special Odette | Dai-Manji(Ver.Gold) | Mini U.F.O(Ver.Gold) | Gemini White & Black | Clone Marco | Flying Shelt | Ravenous Invader | Halle | Special Clone Abby | Great Mother | Great • Crab-Tank | Franke | Giant Hunter Walker | Smasher Returns | Mars Gigantalos | Special Clone Betty | Snow Monoeye | Zombie(Fattish Man Red) | Mars People Officer(COO) | Clone Tarma(Zombie) | Bonny | Special Black
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