MSA news pop-up Extra Ops - Mars Attack

The first, Martian-themed event.

Extra Ops are event-oriented modes with cooperative elements in Metal Slug Attack, first introduced in 1.4.0. The player is presented with stages that cost MSA currency Sortie Points small compressed Sortie Points to play and give MSD currency MSP MSP, MSA Unit Part (Single) Unit Parts, and unique Boot Event Items as drops, while also generating MSA currency Exclusive Points Exclusive Points.

Each event typically introduces new Units. With the exception of Snatch Wars, each Extra Ops has short skits at their beginnings and ends.

Extra Ops types

The Extra Ops have a variety of types, each with unique features. Some appear regularly, and some have been entirely superseded by other types - for example, Score Attack Extra Ops were replaced by Snatch Wars Extra Ops, which were in turn replaced by Try Line Extra Ops. The very first type of event to appear in the game, Marathon Extra Ops, still often appears as the first for each month.

Extra Ops Style Description
ExtraOps-Marathon Marathon Single-player Players work their way across multiple maps, covering three different difficulty levels.
ExtraOps-Pile Rare Boss Single-player A "rare boss" randomly appears as players beat stages, granting access to special unit parts.
ExtraOps-ScoreAttack Score Attack Competitive The final enemy gains power the more times it is beaten. At the end of the event, boss parts are awarded to the highest-scoring players.
ExtraOps-Extension Daily Ranked Competitive Prizes are awarded to the highest-scoring players at the end of each day.
ExtraOps-Basegame Snatch Wars Guild-based Guilds fight for control of the map. Boss parts are awarded to the groups holding the largest areas at the end of each day.
TryLine Try Line Guild-based Coins are gained as guilds work their way towards the center of the map. Prizes are purchased from the Try Shop.
ExtraOps-United United Front Co-operative Players fight together to gain coins. Prizes are purchased from the United Shop.
ExtraOps-Melee Crank Key Co-operative Players work to defeat enemies, acquiring crank keys as their combined kill counts grow higher.

The Ops types also determines the nature of the equippable Event Items used by introduced units. Marathon and Rare Boss EOs have non-craftable silver items. This means the items are only available through that EO until it is released on Another Story. Ranked EOs (both normal and daily) have craftable silver items, meaning that even after their EO is over, the exclusive items can still be created with normal items, but will take longer than usual to complete. Guild Ops bosses except Try Line do not have any unique items of their own and instead rely on normal items to unlock their skills.

Exclusive Points

MSA currency Exclusive Points

MSA currency Exclusive Points Exclusive Points are a currency exclusive to this mode, however they cannot be spent directly and reset at the end of each event. Instead they are used as a unit of measure, rewarding the player for reaching specific milestones. EPs are generated depending on mission outcomes, as well as Completion Rank, and are further influenced by presence of Expert Units in the active deck and use of Reward Up (percentages affect the base values of EP rewards for any given stage). Expert Units can be set up at the Soldier Camp for guild mates to use (bonuses from duplicate units stack) - each unit can only be hired once a day from other players.

The icon representing EP changes depending on the event, though it retains its distinctive silver disc appearance.

Expert Units

Certain units are flagged as "experts" during each event, and add extra Exclusive Points at the end of each mission. These flash while building your deck, making them easy to spot.

Exactly which units are experts depends on the current event. Typically the selection includes:

  • Current Super Rare pre-acquisition / box / step unit (highest bonuses)
  • Current Rare pre-acquisition unit / Pack Shop (second highest bonuses)
  • Last month's Super Rare and/or Rare pre-acquisition unit (slightly lower bonus)
  • Previous Extra Ops boss (lower bonuses)
  • Various units, typically a max of 3 (lowest bonuses) - usually, the Rare unit that can be unlocked in the EO is one of these expert units.

Pressing the Expert button in the Extra Ops menu displays icons next to the current set of experts:

MSA event points increase Increases points gained per victory by X%.
MSA event power increase Unit has increased power and costs less AP to deploy. Best experts have higher AP reduction.
MSA event gold enemy increase (Daily Ranked only) - Increases the chance of golden enemies appearing each stage.
MSA event deck attack increase (Snatch Wars / Try Line only) Increases the damage of all units in that deck.
MSA event progress increase (Score Attack only) - Soldier moves further with each victory (bosses may be fought more often).
MSA event rare boss (Rare Boss only) - Rare bosses appear more often.
Metal Slug Attack Extra Ops
Mars Attack Jupiter King's Extra Ops Mummy's Score Attack!! Ptolemaic Attack Pirates Attack Golden Soldier Black Future CODE : ASSAULT The King of Weapons
Metal Slug Alice Zombie Parade Alien vs. Morden Boy Memories Sand Locker Halloween Train Agent Sally Mutation War Food Army! Destroy the Tower
Invader Girl Operation Ikari Santa Trap Merry Christmas! Queen's Battle Flying Ace Crazy Drive Food Army! 2nd X Day Pharaoh Rebirth
Chocolate of the Dead Signal Red Power of New Versions Signs of Curse Tough & Cool Wild Edge Pirate's Ghost Amadeus Revenge Snatch Wars Jungle Monkeys
Rider's High Green Monster Mad Scientists Snatch Wars Season 2 Break In The Shell Maximum Evolution Next One Snatch Wars Season 3 Clash of the Worlds Bicycle Maiden
Glow in the Dark Snatch Wars Season 4 Double Face Last Resort No Limit Rising Iron Snatch Wars Season 5 Silent Assassin Supply Lines Eternal Way
Snatch Wars Season 6 Dancing Brave Blood Runaway Royal Identity Cross Over Fate Snatch Wars Season 7 White Breath Out of Control Same Direction Snatch Wars Season 8
Time Collision Fall of Disaster United Front the 1st Snatch Wars Season 9 Sadistic Emotion Top Prospect Snatch Wars Season 10 United Front the 2nd Revival of Intention Hero of Justice
Snatch Wars Season 11 Kung Fu Guru United Front the 3rd Butterfly Disaster Advance of Fire Beast Power United Front the 4th Protection of the Fortress Fist Invasion Fire Inhibition
United Front the 5th Best Partner One Mind First Rebellion United Front the 6th Growing Ninja Encounter of Unknown Try Line 1st United Front the 7th Hot Trap
Sky King Theory of Evolution Try Line 2nd Dark Invitation United Front the 8th Tropical Battles Strange Town Auto Battle United Front the 9th Begin Training
Try Line 3rd Destruction and Regeneration Unknown Snow United Front the 10th Sword of Allegiance Try Line 4th Code of Conduct United Front the 11th Escape Plan Try Line 5th
Great Flower United Front the 12th Christmas Wishes Daughter of the Dusk Ace United Front the 13th OneMan Army Try Line 6th The Successor United Front the 14th
Bloom Disaster Guardians of Morden United Front the 15th Killer Scythe Try Line 7th On the Bad Road Pain of My Heart United Front the 16th Memories of Mirage Try Line 8th
Material Affection United Front the 17th Tiny Super Girl Like a Bird
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