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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 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.

On-Foot

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

Slug

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*

L1

* This button combination is turned off by default.

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.
  • 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.

Screenshots

Covers

Metal Slug 7/Metal Slug XX
Heroes Marco RossiTarma RovingEri KasamotoFio GermiRalf JonesClark StillLeona Heidern*
NPCs Cynthia HartnettPOWRumi AikawaMadoka AikawaHyakutaro IchimonjiDonald MordenAllen O'NeilRebel ArmyFuture RebelsMartiansAnnouncer
Enemies FanaticsGrenade SoldierBazooka SoldierShielded SoldierBikersRebel RiflemanMortarGatling SoldierFuture RebelsHunters* • Patrol RobotMetal MoleLaser DronePodsRebel WalkerBatMaggotChariotFlying KillerMan EaterHuge IvyMars People* • Mini-UFO* • UFO*
Enemy Vehicles Di-CokkaBull ChanT-2B Melty HoneyMV-280BMV-280CNop-03 SarubiaGirida-O3-ton Utility TruckR-ShobuMH-6S MasknellEaca-BTurrets
Bosses Worm MechaCrablopsFall MechaThe UnionRebel GigantKraken
Mini-Bosses: Scrap TowerBig Gate
Weapons Heavy Machine GunRocket LauncherShotgunFlame ShotEnemy ChaserIron LizardSuper GrenadeDrop ShotTwo Machine GunsZantetsu SwordThunder ShotGrenadeFire BombArmor Piercer* • Mobile Satellite*
Slugs SV-001SlugnoidSlug Flyer† • Ostrich Slug* • Slug TrolleySlug ArmorSlug Gigant
Missions Scrap IslandCoal MineUnderground FortressThe WaterfallRuins BaseSnowy CountryThe Beginning is the End
Other Combat School (Dialogue) • Weapon StockRush Blaster SystemSuper Devil Mode* • "Scrap Fan"
† Exclusive to Metal Slug 7. * Exclusive to Metal Slug XX.
Metal Slug Series
Games
Main Series Metal Slug: Super Vehicle-001Metal Slug 2/(X) • Metal Slug 3Metal Slug 4Metal Slug 5Metal Slug 6Metal Slug 7/(XX)
Spin-Offs Metal Slug: 1st MissionMetal Slug: 2nd MissionMetal Slug AdvanceMetal Slug 3DMetal Slug Tactics
Tower Defense Metal Slug DefenseMetal Slug AttackMetal Slug Infinity
Mobile Metal Slug MobileMetal Slug Mobile ImpactMetal Slug: Allen's Battle Chronicles (Mobile 3) • Metal Slug Mobile 4 (UMS: Landing) • Metal Slug Soldiers (UMS: Conspiracy) • Metal Slug Fighters (UMS: Fierce Battle) • Metal Slug Warriors (UMS: Triumph) • Metal Slug STGMetal Slug Mars Panic!Metal Slug TacticsMetal Slug M1Metal Slug M2Metal Slug 2013Metal Slug Team MissionMetal Slug: AwakeningMetal Slug: Commander
Pachinkos Metal Slug Type-AMetal Slug SV-001Metal Slug 3
Compilations Metal Slug 4&5Metal Slug AnthologyMetal Slug Complete PCArcade ArchivesNeo Geo Pocket Color Selection
Cancelled / Discontinued Metal Slug GBA PortMetal Slug Zero OnlineMetal Slug TouchMetal Slug RevolutionMetal Slug WarsMetal Slug XX Online
Prototypes Metal Slug Advance
Related Titles
Cameos / Crossovers The King of Fighters '99SNK vs. Capcom: The Match of the MillenniumThe King of Fighters 2000SNK Vs. Capcom: CHAOSNeo-Geo Battle ColiseumThe King of Fighters: Maximum Impact 2SNK Vs. Capcom: Card Fighters ClashSNK Vs. Capcom: Card Fighters DSDays of Memories 2Neo Geo Heroes: Ultimate Shooting!Battle CatsRPG! Sister QuestJetpack JoyrideThe King of Fighters XV
Ikari Warriors Ikari WarriorsVictory RoadIkari III: The RescueIkari: Leona Gekitohen
Irem Games
Irem's D.A.S. Universe Air DuelUndercover CopsIn The HuntGunforce II
Publishing
Books Metal Slug: The Ultimate HistoryMetal Slug Attack Official Artbook
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