Metal Slug XX (reads Metal Slug Double X) is a enhanced modification of Metal Slug 7, released in December 2009 for the Playstation Portable and Xbox Live Arcade with new content.

New Features

  • The screen is not re-dimensioned anymore, like in the Nintendo DS. Additionally, the player can select the aspect ratio of the screen:
    • 4:3 (Classic aspect ratio with designed borders at left and right of the screen)
    • Wide (Fullscreen)
    • Clear (Like "4:3" but with a smaller screen for better visual quality)
  • Rebel Troops reuse their sound effects from Metal Slug 6 (PSP only).
  • Old enemies reappear again, such as the Mars People and the Hunters.
  • Change in items, slugs, and enemy placement.
  • Multiplayer mode by using ad hoc and online services.
  • Leona Heidern as a downloadable character (Costs $0.99).
  • New missions in the Combat School mode.
  • New Hidden Routes:
    • Mission 1 - There should be a pitfall/hole before the Di-Cokka and the DANGER barrel. Go there and fight the hunters.
    • Mission 5a - When you reach the end of the second part of the stage, it says GO right. Instead, go left until you find a teleporter. Go in the teleporter and fight UFOs and tons of soldiers.
    • Mission 5b - Just like Mission 5a but do not go in the teleporter. Jump over it. You should fight hordes of Mars Peoples in there.


  • 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.



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
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 Defense | Metal Slug Attack | Metal Slug XX Online
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
Cameos 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
Canceled / Discontinued Metal Slug Zero | Metal Slug Touch | Metal Slug Revolution | Metal Slug Wars
Ikari Warriors Ikari Warriors | Victory Road | Ikari III: The Rescue | Ikari: Leona Gekitohen
Irem's D.A.S. Trilogy

In The Hunt | Undercover Cops | Gunforce II

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