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Come on! I'll make mincemeat out of ya!
~ Allen O' Neil
See you in Hell!
~ Allen O' Neil's famous quote upon being defeated .

Sergeant Allen O'Neil Sr., also simply known as Allen O'Neil, is the top soldier of Donald Morden and a recurring antagonist and boss in the Metal Slug series. He is infamous as the Immortal Devil Sergeant due to his virtual immortality, being able to cheat death and seek revenge against the Regular Army.

Biography[]

Past[]

Allen was a high-ranked sergeant in the Regular Army, known for his impressive combat skills and toughness. He was the most trusted soldier of Donald Morden, who always gave him the most complicated missions. Allen always enjoyed fighting for Morden, as much as he enjoyed staying with his wife and son after a tough day. When Morden defected from the Regular army, Allen followed him out of loyalty, disappearing with him in the subsequent years.

At some time, he married a woman named Henrietta O'Neil and sired two children: Nancy and Allen Jr., the latter who also joined the Rebel Army to aid his father in defeating the Regular Army. His charismatic leadership allows him to establish his own troops known as the "Allen Platoon."

Metal Slug[]

When Morden reappeared as the leader of the Rebel Army and started his rebellion against the world, Allen was also with him, being a key piece on the insurgence. Allen was designated to protect the supply warehouse at the peak of the Kathehirt Valley, single-handedly slaughtering all the troops that dared to climb the dangerous mountain. When the Peregrine Falcon soldiers Marco Rossi and Tarma Roving climbed the mountain, they were forced to fight Allen. They defeated him, and he was presumed to be deceased.

Allen showed up again during the subsequent conflicts, always presumably dying in gruesome ways and coming back again as if nothing had happened.

Metal Slug 2/X[]

Allen was spotted once again in a Rebel Army base located at a frozen tundra, aiding Morden again with his plans of conquering the world in coalition with the Mars People. Allen attempted to dispose the intruding Regular Army troops but was ultimately defeated where his lifeless body fell down and was eaten by a giant orca.

Metal Slug 3[]

Despite his death in the last game, Allen returns to seek revenge against the Regular Army. He is seen aboard the Hairbuster Riberts, a bomber plane. Allen was presumably defeated after the plane was wrecked. Despite this, he is last seen aiding the Regular Army troops in a temporary alliance to storm Rugname.

Metal Slug 4[]

A cyborg clone of Allen O'Neil appeared manning the Toschka Dalanue, an artillery tower developed by the Amadeus Syndicate, this clone died along with the Dalanue exploding. Later on, the Regular Army defeats an another Mecha Allen just like the fake android Morden found in the Amadeus secret base. According to Metal Slug Attack, the Mecha Allen's durability exceeds the original one.

Metal Slug 7/XX[]

The Regular Army troops faced Allen O'Neil with his Rebel Gigant, but was ultimately defeated in the snowy areas of the Scrap Island.

Personality[]

Allen is a proud charismatic warrior with a strong sense of loyalty. He also shows a sense of pride and confidence, taunting his enemies during his fights.

Powers and Abilities[]

As a Sergeant of the Rebel Army and the right-hand man of Donald Morden, Allen O'Neil is skilled in both hand-to-hand combat and weaponry. His weapon of choice is M60. Despite carrying heavy weapons, Allen is fairly agile, even more so than the Regular Army troops. Allen also possesses superhuman degrees of strength and durability, he can resist explosions and bullets, manages to come back every time he gets defeated, lift a buzzsaw with little effort, and even carry the Perfect Jupiter King's torso as its lower body which demonstrates his inhuman stamina, allowing him to carry extremely heavy weapons without showing visible signs of exhaustion.

Allen O'Neil's infamous ability is his immortality. Despite being seemingly killed at numerous occasions, he is able to get back and encounter the Regular Army troops once more, thus earning his nickname the "Immortal Devil Sergeant".

Quotes[]

YA HA HA HA HA HA!
~ Allen O' Neil laughing.
Go home to Mommy!
~ Allen O' Neil
You're mincemeat!
~ Allen O' Neil
Come on, boy!
~ Allen O' Neil's catchphrase.

Gallery[]

Navigation[]

           Mslug logo Villains

Rebel Army
General Donald Morden | Allen O' Neil | Allen Jr. | Abigail | Beatriz | Abul Abbas | Vita | Navy | Nova | Rapid | Shizuka | Destrade | Julia | Aisha | Huracan | Izabella | Grazia | Loretta | Norah | Chloe | Dion | Edda | Vicky | Romy | Dolores | Emma | Kriemhild | Katalina | Conny | Nantes | Padwah | Growth & Cline | Naomi | Alesha

Phantom Squad
Hilde Garn | Macba | Kanan | Lt. Wired

Mars People
Rootmars | Professor | Marty | Percier | Gemini Twins | Ariadna | Clone Abby | Clone Betty | Halle | Bonny | Pauline | Leone | Clario | Unsigned

Amadeus Syndicate
Amadeus | White Baby | Iron Fortress | First Baby

Ptolemaic Army
Ptolemaios | Avatar of Evil | Dragunov | Yoshino | Caroline | Veronica | Mira | Towa | Sisilia | Simon | Miharu | Chunyan | Sho | Beecham | Owen | Damian | Maria | Sally | Achetto | Lucy | Phoebe | Josette | Mizuna | Svetla

Invaders
Invader King | Odette | Annette | Nowan | Franke | Bersek | Rillacle | Teleko | Schwarz Metzelei | Fedeln Metzelei | Bloom Metzelei | Geweih Metzelei | Odile | Purple King | Barbeln | Biene Goldenes | Drache Goldenes | Swordeist

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