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ExtraOps-United

A new type of Extra Ops introduced in December 2017, United Front-style Extra Ops function extremely similar to the Crank Key Extra Ops as well as having a cooperation mode similar to Metal Slug Defense's co-op mode.

During United Fronts, three dailies are available - successfully complete Solo, PT and United modes 3 times. Completion of these dailies yields 1000 MSA currency United Coins.

Modes

Solo

Considered to be the easiest of the three modes, Solo mode allows the player to attempt the Extra Ops by themselves. It uses the least amount of sorties, but also gives a poor sortie:coin ratio. If the enemy base is struck, then the AI retaliates with a large amount of units.

There are three difficulties players can select; Very Easy, Normal and Very Hard.

Difficulty Enemy Strength
MSA difficulty 1-Very Easy
MSA difficulty 3-Normal
MSA difficulty 5-Very Hard

Solo mode follows the same format as with all other Extra Ops - defeat means the player can spend 30 medals to reattempt the stage, though it is not recommended to do so. Leaving the level upon being defeated yields reduced coins.

Very Easy mode provides 120 coins, Normal 240, and Very Hard 360 coins (not including any experts in the player's deck).

Point

This mode is slightly harder than Solo, but offers the most points at the cost of most sorties. Players cooperate with others in real time to defeat the enemy in a set amount of time. If a partner cannot be found within 45 seconds, then the player can select the CPU-cooperative to have the AI use the deck instead.

If the enemy base is struck, then the AI retaliates with a large amount of units.

Difficulty Enemy Strength
MSA difficulty 2-Easy
MSA difficulty 4-Hard
MSA difficulty 6-Hell

As of the 3.11.0 update, players may rematch with their partners up to five times. With friends, the first rematch is free, but the remaining tries will require sorties from both players. If one player leaves, no further rematches can be done for the day even if the limit has not been reached.

Easy mode provides 240 coins, Very Hard 480, and Hell 960 coins upon completion (not including any experts in the player's deck).

If the team loses the Point battle, then the amount of coins obtained is greatly reduced.

United Battle

This mode is considered the hardest out of the three, as a mobile satellite guards the enemy base which periodically shoots out four lasers at allied units for high damage. Like Point mode, United Battle is also co-op and also has a CPU co-op feature if a partner cannot be found in time.

In this mode, the enemy consists of random units from the first deck of other players, all controlled by the AI. This mode factors in the two player's levels - strong players means the enemy deck is significantly stronger, and the base has greatly increased health. Like the previous modes, striking the enemy base will cause the AI to retaliate with a large amount of units. However, the AI is generally less strict with this - the rush of units only arrive if the base loses around 20% of its health.

As of the 3.11.0 update, players may rematch with their partners up to five times. With friends, the first rematch is free, but the remaining tries will require sorties from both players. If one player leaves, no further rematches can be done for the day even if the limit has not been reached.

If the team loses the United Battle, then the players automatically get a "D" rank as their coin bonus - the original amount of points remains unaffected. Unlike the previous two modes where the points are always the same regardless of how long the event lasts, United Battle either offers a varying amount of United Coins based on the duration of the event.

United Battle offers 650 or 750 coins respectively upon completion (not including any experts in the player's deck), depending on the duration of the United Front; 6 for 750, and 7 for 650.

United Coins

MSA currency United Coins

United Coins are used to buy various rewards through the United Shop, such as unit parts, equippable items, MSP, medals, and new avatar icons. Any coins that remain unspent after the event ends are automatically converted to MSP through the mailbox, at a 1:200 ratio (the same as purchasing it through the United Shop manually).

United Front Extra Ops boasts several golden-colored bosses and rare units, each of them having their own unique unorthodox abilities which allow them to effectively fulfill their roles in battle.

Rewards

Each mode - Solo, PT and UB all share the same reward table. With each victory (or defeat in UB) in each mode provides "points" that are grouped together to unlock rewards from the reward table. The difficulty determines how much of these points are provided upon victory:

  • Solo - 1, 2, 3
  • PT - 2, 4, 8
  • UB - 5 (x2 so effectively 10)

As more stars are accumulated by participants, further rewards are unlocked. Rewards from the table include Mystery Crank Keys, various currencies (including United Coins) and at the end of each table are 500 medals to claim. This means up to six Mystery Crank Keys and 1,500 Medals can be obtained at 3,000,000 points and 3,500,000 points respectively. However, in 7 day United Front Ops, the amount of points required to obtain the medal reward is increased to 3,750,000.

Used Shop

As of the 3.15.0 update (United Front X), players may spend their accumulated United Coins in the Used Shop. This shop sells units and their related items, and stocks all merchandise up until the two most recent United Front Ops. The Used Shop works similarly to the Rare and Extra Shops.

Typically it is not recommended to spend on this shop unless the player shows interest in the old units, given their lack of usefulness in catching up with the current trends. Both the silver and gold-framed Super Rare units cost significantly more, where as a platinum, fully equipped Rare unit (assuming one starts from scratch) only costs slightly higher compared to their first release.

The Used Shop offers the following:

  • x1 Unit Part (Rare) - 600 MSA currency United Coins
  • x1 Unit Part (Super Rare) - 4000 MSA currency United Coins
  • Silver Item (Rare) - 750 MSA currency United Coins
  • Silver Item (Super Rare) - 3000 MSA currency United Coins
  • Gold Item (Rare) - 1500 MSA currency United Coins
  • Gold Item (Super Rare) - 6000 MSA currency United Coins
  • Platinum Item (Rare Skill 4 Item) - 2250
  • Platinum Item (Rare Skill 5 Item) 3000 MSA currency United Coins
  • Platinum Item (Super Rare Skill 4 Item) - 12000 MSA currency United Coins
  • Platinum Item (Super Rare Skill 5 Item) - 18000 MSA currency United Coins

List of Ops

All Extra Ops of this type
Extra Ops Version Rare Prize Main Prize
United Front I 2.18.0
United Front II 2.20.1
United Front III 3.0.0
United Front IV 3.2.0
United Front V 3.4.0
United Front VI 3.6.1
United Front VII 3.8.0
United Front VIII 3.11.0
United Front IX 3.12.0
United Front X 3.15.0
United Front XI 3.17.0
United Front XII 3.19.0
United Front XIII 3.21.0
United Front XIV 3.23.0
United Front XV 4.0.0
United Front XVI 4.3.0
United Front XVII 4.4.0
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

Trivia

MSAttack Navigation
Game Modes Another Story | Attack!List of Standard MissionsList of Elite Missions | Battle and Team Battle | Combat School | Extra OpsList of Extra Ops | Online | P.O.W. Rescue | Rank Match | Special Ops
Features User Profile | Level and EXP | VIP | Build Up | Unitsby IconTeamsUnobtainable | Stats | Itemsby StatsEvent Items | GuildList of Guild Raid Stages | Daily Login | Daily Quests | Events | Power-Up | Quests | Mystery Crank | Treasure Hunt | Shops | Dream Lottery | Beginner Support Campaign
Extras Patch Notes


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