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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. A remastered version for the PlayStation 4 was released in May 29, 2018.

New Features and Differences

  • 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 and PS4).
  • Old enemies reappear again, such as the Mars People and the Hunters.
  • Change in items, Slugs, and enemy placement.
  • A new announcer; bits and pieces of the previous announcers can be heard.
  • Multiplayer mode by using ad hoc and online services. Unlike other games, there is no drop-in multiplayer,
  • Leona Heidern as a downloadable character (Costs $0.99).
  • Altered challenges 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.
  • New Special Moves:
    • Marco has the Burst Shot. He can autofire at a faster rate but has to stay still.
    • Tarma can kick vehicle Slugs to replenish its health, although this attack can also randomly damage the Slug.
  • Implementation of 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 People in there.
  • Xbox 360/Xbox One Exclusives:
    • Achievements (12)
    • Sound Adjustments:
      • Leona uses a unique death cry than using her old King Of Fighters sounds.
      • The Rebels use their old yells.
      • The new announcer shouts "Final Mission Start" instead of the Metal Slug 6 announcer.
  • PlayStation 4 Exclusives:
    • Leona Heidern available from the get-go (no purchase required).
    • 4K and 1080p resolution. The characters in the menu screen have been redrawn.
    • Scanlines to simulate CRT and Arcade screens.
    • Trophy support (30 including a Platinum).

Trivia

  • 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.

Screenshots

Covers

Games
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