Metal Slug Wiki
Metal Slug Wiki

Not to be confused with the Slug's special self-destructing ramming attack.

Metal Slug Attack (Japanese: メタルスラッグアタック - Metaru Suraggu Atakku[1]) is a tower defense game created by SNK Playmore for iOS and Android mobile devices. It was originally announced by SNK Playmore in November 2015, and then officially released for Android and iOS on 14 February 2016[2][3]. The game itself is a sequel to Metal Slug Defense, featuring numerous improvements and brand new game modes.

The official time zone is GMT+9 (Japan Standard Time).


Much like its predecessor, at the core of this game is the 2D (side-scrolling, given the main series' style) 1-on-1 subgenre of tower defense/strategy, with 2 bases on either side of the level where units are spawned. The main objective of the game is to destroy the opposing base by any means.

Once the game begins, forces start accruing Action Points (or AP for short), which are used to produce units that automatically advance toward the enemy's base. They can either execute attacks, or construct objects that impede the opponent, support allies, or produce additional units at no cost. Paying Rumi Aikawa a certain amount of AP will improve the rate at which AP build up, as well as the maximum AP that can be stored a time. Additionally, destroying enemy units grants a small amount of AP.

Most combatants have both a standard attack (melee and/or ranged) and a special attack. When the unit is within range of an enemy, it will begin its standard attack. After a predetermined length of time, the special attack will become available, indicated by a light blue "aura" surrounding the unit, that is activated by tapping the unit or the "Attack" button. After finishing the special attack, the unit will continue with its standard attack until the special attack is charged again. For an extra edge in battle the player can purchase Power-Ups.

Metal Slug Attack goes farther at allowing players to improve their units' effectiveness.

The most noteworthy aspect that distinguishes Metal Slug Attack from its predecessor is introducing a large cast of characters, vehicles, and weapons not seen in previous games. The game goes further by having an interconnected storyline that expands the Metal Slug universe in terms of character development and continued conflict between the various armies.

Main Menu

Game Modes

  • Attack! is the primary single player game mode and represents a direct improvement of MSD's Sortie.
  • Special Ops is a timed cooperative challenge consisting of 3 stages.
  • Battle (unlocked at Level 3) is a competitive asynchronous multiplayer mode in which players attack each other and NPCs in pursuit of higher ranks and Battle Medals. The medals can be used to purchase Rebel Army unit parts in the Battle Shop.
  • Combat School (unlocked at Level 4) is similar to MSD's Mission game mode, sans predetermined unit decks. Missions differ each day of the week.
  • P.O.W. Rescue (unlocked at Level 5) is a timed mode in which the player is tasked with completing a series of stages of increasing difficulty. Regular Army unit parts can be purchased here using the POW Shop.
  • Guild Raid (unlocked at Level 8) is a cooperative game mode in which players attack difficult targets spread across several stages. Completing raids rewards Guild Medals which can be used in the Guild Shop to purchase Space and Independent Army unit parts.
  • Online (unlocked at Level 10) is the equivalent of MSD's Wi-Fi VS and is one of the two real-time PVP modes available.
  • Team Battle (unlocked at Level 20) is a competitive asynchronous multiplayer mode, similar to Battle but having to fight three different decks and requiring beating two out of three battles to win. Battle Medals can be used to purchase Ptolemaic Army unit parts in the Team Battle Shop.
  • Extra Ops is a limited time mode where various side stories from the Metal Slug lore appears as special events (complete with intro movies, and sometimes endings), clearing all stages will reward the event unit, though that may be not the case, as the mode varies from each Extra Ops event, and the ways to earn extra prizes, such as MSP, Medals, Units, and so on.
  • Another Story, added in the 2.0.0 update is where the player can check out more of the backstory to MSA within certain characters and various chapters within the five main factions. One can also earn previous EO unit parts/items along with exclusive units to unlock in this mode as well. Originally, the player only had 3 chances daily to play in this mode, but now, as of patch 4.0, attempts are infinite as long one has enough sorties to play. Chances are refreshed daily.
  • Rank Match/Metal Arena (unlocked at Level 10) is the second real-time PVP mode. Unlike Online, this mode only opens in specific time ranges for an hour. Medals are rewarded depending on the player's rank before the season ends.

Economy Related Features

  • Build Up is the equivalent of the Customize menu in Metal Slug Defense. Players use MSP to level up their units levels, skill strength, and bases.
  • Mystery Crank is a gambling station where the player uses MSP and Medals to earn units, unit parts, and rarer items.
  • Daily Login gives rewards each day for logging in.
  • Daily quests give considerable MSP, EXP, and Sortie rewards for activity.
  • Quest gives primarily Medal rewards for reaching milestones.
  • Mailbox is where automatic event rewards are stored until a player collects them.
  • Free gives Medal rewards for watching advertisement, downloading apps and following steps. This feature was removed in the 4.5.0 update.
  • Extra Shop and Rare Shop (unlocked at Level 3) are occasionally unlockable via Attack!. Unit parts and items are purchasable using Metals
  • Shop (unlocked at Level 4) is always available. Unit parts and items are purchased using MSP.
  • Treasure Hunt (unlocked at Level 9) is a bonus way of obtaining pre-determined Units and Sortie for MSP.
  • Mars Shop (unlocked at Level 15), added in the 1.8.0 update, a new shop appears where one can buy exclusive unit pieces or items within trading unit pieces after said unit has already been evolved to the Platinum level, and any overflow pieces can be converted to "Mars Points", piece currency as follows...Normal: 1/Rare: 10/Super Rare: 40 per piece.
  • Dress Up, added in the 2.7.0 update, is an additional shop where the player can purchase avatar icons, bases, and custom BGM to be set in-game, during the main menu, and in online. Some are free while others cost medals.

Social Features

  • Message is the only means to communicate globally, with one's Guild, or with another player. It also notifies a player of being attacked or when a clan mate is requesting help with Special Ops.
  • Event is where the developers post announcements.
  • Ranking (unlocked at Level 10) (one for Guild mode and another one for Online mode, and even one for Extra Ops, the first being the Sol Dae Rokker themed event).

Differences from Metal Slug Defense

Although having the same core game mechanics as Metal Slug Defense, aside from introducing new features, Metal Slug Attack has changed how old things work in comparison to its predecessor.


  • Multiple game modes with different rules, to the point that a busy person may find that there is too much to do.
  • Units can be upgraded in various ways - from flat stat increase to learning special attacks and effects.
  • Additional charged command abilities are available - aside from the Metal Slug Attack (the charging self-destructing SV-001) there are Recovery and Reload powers to heal units and instantly charge special attacks respectively.
  • AUTO mode in combat is always available and does not block manual production [added in 1.2.0].
  • Introduction of the Guild System and means to communicate with other players.
  • Daily Login contributes to one's VIP EXP up to VIP level 9.


  • By requiring internet access the game prevents offline exploits (i.g. free level restart) but makes loading times between every single menu action preposterously longer. (Although, later updates make the load times noticeably shorter.)
  • An unskippable tutorial holds a new player's hand through introductory missions and shows how core mechanics work.
  • Although players can acquire Units not exclusively with Medals, the process of doing so is significantly prolonged and depends heavily on chance.


  • Stock (fresh, non-upgraded) units have limited combat effectiveness.
  • Only 5 out of 10 unit cards can be seen on the screen in combat at a time, as opposed to 6, hindering player performance. This is dependent on the player's device and current mode being played.
  • Stacking units from one faction exclusively into a single deck no longer provides HP boost. [patched in 1.0.4]
  • Searching opponents in Online by similar deck AP value is no longer possible.


MS 20th Anniversary (Big).png
  • Metal Slug Attack was released as the official game for the series' 20th anniversary.[1]
  • Much like its predecessor, Metal Slug Defense, this game recycles assets (e.g. graphics, sounds, and music) from other games in the series. Some of game mechanics are an improvement upon concepts from Metal Slug Defense and Metal Slug Wars.
  • Upon changing the user's date and time in settings then visiting the "Customize Unit" menu, players are able to see the upcoming Extra Ops/Guild Ops units, rewards, and pickup unit. This can be also explained as the next extra/guild ops units are hidden until the current Extra/Guild Ops ends.
  • When using the special attack, most of the newcomers will shout "Attack!"

External Links



Metal Slug Attack
Main Characters Marco Rossi | Eri Kasamoto | Tarma Roving | Fio Germi | Donald Morden | Allen O'Neil | Abigail | Ptolemaios | Dragunov | Yoshino | Professor | Red Goblin
Factions Regular Army | Rebel Army | Ptolemaic Army | Space Army (Martians | Invaders) | Independent (Amadeus Syndicate | Mummy Army)
Sub-Groups Metal Device Project | Blaze Brigade | Frozen Brigade | ACE | Mutants | Believers | Mars People Rangers | Metzeleis | Valerian Bears | Red Goblin Society | Vampires | Yuki Tsuki Hana | World Military Corp.
Other List of Metal Slug Attack Characters
Vehicles and Slugs
Regular Army Slug Attacker | Slug Defender | Slug Rising | TS-001 | Ball Slug | Giant Copter | Slug Square | Tiger Slug | Coil Tank | Tail Slug | Ashley's Slug Flyer | Patrol Slug
Rebel Army Iwa Oh | Julia's MV-280 | Naglfar | Denturion | Alesha's Bike | Armed Tiltrotor | Vicky's Sarubia | Dolores' Sarubia | Nantes' Tank | Emma's Recycle Box | Loretta's Blaze Vortex | Marinesk
Ptolemaic Army D-001 Tanbal | Towa's Mech | GIP-03 Bergenia | Snordon | Glidron | Humphrey's Hoverboard | Hammer DX5005
Space Army Mars Gigantalos | Mars Sweeper | Purple King | Leone's Shoe | Pauline's Mech
Independent Army El Dorado's Slug Armor | Minerva's Ostrich | Maya's Excavator | Kagura's Samurai Mech | Sharifa's Golem
MS-Alice | MS-Heart | Wade | White Baby | First Baby | Iron Fortress | Machyna | Type:Ant-Lion
Extra Ops Ptolemaios | Sky Jupiter King | Doctor Type: AI
Recapture Mega Drill Slug | Queen Big Snail | Riviere Hyll | Gaia Elephant | Metal Fusioner No.223
Try Line Ball Slug | Great Mother | K-O3 Coupled Armored Vehicle | Land Blowfish | Cyclobster | Slug Square | Zoni Doloma | Quadro Jumper | Fortmeranian | Giant Copter | Flying Hermit | Et A Omnis | Element Giant | Mini-Bata | Digger Base | Screamer | Airborne Denturion | Mass Production Tail Slug | Slug Striker | Arms Copter
Task Force Rock Mole | Elder Centipede | Runaway Brain Robot | Master Kraken | D-Gu | Astro Slug | Monoeye Gate | Crusty Legs | Armored Crawler | Clone Incubator | 7000 Class Locomotive | Frozen Vortex
Ultimate Mission Golden Slug Phoenix | Perfect Jupiter King | Avatar of Evil | Invader King | Celestial Ruler Rokker
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