Metal Slug XX (reads Metal Slug Double X) is an enhanced modification of Metal Slug 7.

Metal Slug XX was released in December 2009 for the PlayStation Portable and Xbox Live Arcade with new content. These are backwards compatible with the PlayStation Vita and Xbox One respectively.

A remastered version for the PlayStation 4 was released on May 29, 2018 and for Steam on January 31, 2019.

New Features and Differences

  • The screen and graphics are not re-dimensioned anymore, like in the Nintendo DS. Additionally, the player can select the aspect ratio of the screen:
    • 4:3 (Regular aspect ratio with designed borders at left and right of the screen)
    • Wide (Fullscreen with the graphics stretched)
    • Clear (Classic Neo Geo aspect ratio)
  • Rebel Troops reuse their sound effects from Metal Slug 6 (except for Xbox 360/One).
  • Old enemies reappear again such as the Mars People and the Hunters.
  • Change in items, Slugs, and enemy placement. The Ostrich Slug is added in this version.
  • Mission 1 and Mission 6 take place in different times of day.
  • Infinite continues to all difficulties.
  • A new announcer; bits and pieces of the previous announcers can be heard.
  • Reintrodution of multiplayer mode by using ad hoc and online services. Unlike previous games, there is no drop-in multiplayer.
  • Leona Heidern as a downloadable character (costs $0.99). She has several gameplay benefits:
    • Her Special Action is the Moon Slasher. It can tear down enemies and machinery with higher damage than grenades. It can also nullify projectiles.
    • Vehicle Slugs' health is increased from three to four hits.
    • 20% more ammo on any weapon crate.
    • 20% more grenades/firebomb. Leona's grenades are her earring bombs.
    • Leona keeps her weapons upon death. She loses them when continuing.
  • Altered challenges and ranking table in the Combat School mode. The Item Collection challenges are replaced by the returning Survival challenge and Super Devil rank. Players can switch characters without quitting back to the challenge list.
  • Implementation of Hidden Routes:
    • Mission 1
      • Hunter Hideaway: There should be a pitfall/hole before the Di-Cokka and the DANGER barrel. Go there and fight the Hunters.
    • Mission 5:
      • Deeper Ruins: When you reach the end of the second part of the stage, it says GO right. Instead, go left until you find a Warp Base. Get in the Base and fight UFOs and tons of soldiers.
      • Mars People Hallway: Just like the previous entrance but do not go in the Base. Jump over it. You should fight hordes of Mars People in there.
  • Xbox 360/Xbox One Exclusives:
    • Achievements (12)
    • Sound Adjustments:
      • Leona uses a unique death cry rather than using her old King Of Fighters defeat sound.
      • The Rebels use their old Neo Geo yells.
      • The new announcer shouts "Final Mission Start" instead of the Metal Slug 6 announcer.
  • PlayStation 4/Steam Exclusives:
    • Leona Heidern available from the get-go (no purchase required).
    • 4K and 1080p resolution. The characters in the menu screen have been redrawn.
    • New borders for the Clear and 4:3 aspect ratios.
    • Scanlines to simulate CRT and Arcade screens.
    • PlayStation trophy support (30 including a Platinum).
    • Steam achievements (34)

Default Controls

All versions include auto-fire (off by default) and allow button combinations to be set to a single button.


Action PSP/Vita Xbox 360/One PS4
Shoot Square X Square
Jump X A X
Grenade Circle B Circle
Change Weapon R RB R
Special Melee Attack L + Square RT

LB + X

L1 + Square
Throw Weapon L + Circle LT

LB + B

L1 + Circle
Special Action Up + L + Square Y

Up + LB + X

Up + L1 + Square


Action PSP/Vita Xbox 360/One PS4
Shoot Square X Square
Jump X A X
Exit Slug Down + X Down + A Down + X
Cannon Circle B Circle
Grenade Down + Circle Down + B Down + Circle
Frontal Attack L LB

X + A*


* This button combination is turned off by default.


  • Metal Slug XX is the third installment in the series to increase the number of playable characters, from 6 to 7 with the addition of Leona.
  • Metal Slug XX is the first game since Metal Slug: 2nd Mission where the game's announcer shouts the game's title.
  • Using Leona (as well as most PSP downloadable content) in the PlayStation Vita requires purchasing the DLC in the PS store's website and using a PS3 to download and transfer the data to the Vita via cable.



Metal Slug 7/Metal Slug XX
Heroes Marco Rossi | Tarma Roving | Eri Kasamoto | Fio Germi | Ralf Jones | Clark Still | Leona Heidern*
NPCs Cynthia Hartnett | POW | Rumi Aikawa | Madoka Aikawa | Hyakutaro Ichimonji | Donald Morden | Allen O'Neil | Rebel Army | Future Rebels | Martians | Announcer
Enemies Fanatics | Grenade Soldier | Bazooka Soldier | Shielded Soldier | Bikers | Rebel Rifleman | Mortar | Gatling Soldier | Future Rebels | Hunters* | Patrol Robot | Metal Mole | Laser Drone | Pods | Rebel Walker | Bat | Maggot | Chariot | Flying Killer | Man Eater | Huge Ivy | Mars People* | Mini-UFO* | UFO*
Enemy Vehicles Di-Cokka | Bull Chan | T-2B Melty Honey | MV-280B | MV-280C | Nop-03 Sarubia | Girida-O | 3-ton Utility Truck | R-Shobu | MH-6S Masknell | Eaca-B | Turrets
Bosses Worm Mecha | Crablops | Fall Mecha | The Union | Rebel Gigant | Kraken

Scrap Tower | Big Gate

Weapons Heavy Machine Gun | Rocket Launcher | Shotgun | Flame Shot | Enemy Chaser | Iron Lizard | Super Grenade | Drop Shot | Two Machine Guns | Zantetsu Sword | Thunder Shot | Grenade | Fire Bomb | Armor Piercer* | Mobile Satellite*
Slugs SV-001 | Slugnoid | Slug Flyer† | Ostrich Slug* | Slug Trolley | Slug Armor | Slug Gigant
Missions "Scrap Island" | "Coal Mine" | "Underground Fortress" | "The Waterfall" | "Ruins Base" | "Snowy Country" | "The Beginning is the End"
Other Combat School (Dialogue) | Weapon Stock | Rush Blaster System | Super Devil Mode* | "Scrap Fan"
† Exclusive to Metal Slug 7. * Exclusive to Metal Slug XX.
Metal Slug Series
Main Series Metal Slug: Super Vehicle-001 | Metal Slug 2/(X) | Metal Slug 3 | Metal Slug 4 | Metal Slug 5 | Metal Slug 6 | Metal Slug 7/(XX)
Spin-Offs Metal Slug: 1st Mission | Metal Slug: 2nd Mission | Metal Slug Advance | Metal Slug 3D | Metal Slug Tactics
Tower Defense Metal Slug Defense | Metal Slug Attack | Metal Slug Infinity
Mobile Metal Slug Mobile | Metal Slug Mobile Impact | Metal Slug: Allen's Battle Chronicles (Mobile 3) | Metal Slug Mobile 4 (UMS: Login) | Metal Slug Soldiers (UMS: Tank Conspiracy) | Metal Slug Fighters (UMS: Fierce Battle) | Metal Slug Warriors (UMS: Triumph) | Metal Slug STG | Metal Slug Mars Panic! | Metal Slug Tactics | Metal Slug M1 | Metal Slug M2 | Metal Slug 2013 | Metal Slug Team Mission | Metal Slug: Awakening | Metal Slug: Commander
Pachinkos Metal Slug Type-A | Metal Slug SV-001 | Metal Slug 3 (Pachinko)
Compilations Metal Slug 4&5 | Metal Slug Anthology | Metal Slug Complete PC | Arcade Archives | Neo Geo Pocket Color Selection
Cancelled / Discontinued Metal Slug (GBA) | Metal Slug Zero Online | Metal Slug Touch | Metal Slug Revolution | Metal Slug Wars | Metal Slug XX Online
Prototypes Metal Slug Advance
Related Titles
Cameos / Crossovers The King of Fighters '99 | SNK vs. Capcom: The Match of the Millennium | The King of Fighters 2000 | SNK Vs. Capcom: CHAOS | Neo-Geo Battle Coliseum | The King of Fighters: Maximum Impact 2 | SNK Vs. Capcom: Card Fighters Clash | SNK Vs. Capcom: Card Fighters DS | Days of Memories 2 | Neo Geo Heroes: Ultimate Shooting! | Battle Cats | RPG! Sister Quest | Jetpack Joyride | The King of Fighters XV
Ikari Warriors Ikari Warriors | Victory Road | Ikari III: The Rescue | Ikari: Leona Gekitohen
Irem Games
Irem's D.A.S. Universe

Air Duel | Undercover Cops | In The Hunt | Gunforce II

Books Metal Slug: The Ultimate History | Metal Slug Attack Official Artbook
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