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The Mystery Cranks are a gacha-based system in Metal Slug Attack, offering random Units and Items in exchange for either MSA currency Medal Medals or MSD currency MSP MSP. Many of the more powerful units are only available via the medal-based cranks.

Each day, a MSA Daily Daily quest offers EXP 80 and MSD currency MSP 5,000 [as of 1.3.0] for the first spin performed. The primary Medal Crank can be pulled once for free (resetting at 4am JST), whereas the MSP Crank offers up to five free pulls during different timeslots. Players with a sufficiently advanced VIP Level also earn a spin of the VIP Crank.


MSP Crank

MSA banner crank MSP 1.0.2
By consuming MSP unit ank items are to come.

As the name implies, this crank takes in payments of MSD currency MSP MSP: 10,000 for a single spin, or 90,000 for ten spins at a time.

It offers scheduled free single spins at regular intervals throughout the day (JST):

  • 0700 - 0900 hours.
  • 1200 - 1400 hours.
  • 1500 - 1700 hours.
  • 1800 - 2000 hours.
  • 2200 - 0000 hours.

Bronze crank keys (allowing free spins) can also be obtained by tapping Fat Fio when she appears on the game's menu screen.

MSA crank MSP
Prize MSA rarity Rare
30x
MSA rarity Rare
10x
MSA rarity Rare
3x
MSA rarity Normal
10x
MSA rarity Normal
3x
MSA item II -qstn-
3x
MSA item I -qstn-
8x
Odds 0.182% 0.91% 2.73% 7.8% 23.4% 23.4% 41.6%
* Odds are approximations, and may be subject to frequent change.


Medal Crank

MSA banner crank Medal 1.0.2
★ Complete ≪10 PLAY≫ to be sure to get SR Units.

As the name implies, this crank takes in payments of MSA currency Medal compressed Medals: 300 for a single spin, or 2,600 for ten spins at a time. As of 1.4.0, a 10x spin will always grant at least one 80-part icon for a random Super Rare unit (enough to unlock it if it isn't already owned, and often enough to evolve it if it already is).

One free spin can be performed each day (resetting at 4am JST[as of 1.17.0]). Silver crank keys can occasionally be obtained via Extra Ops events - collecting ten of these also allows for a 10x spin.

The content of the Medal Crank frequently changes. The most recent additions are marked as "pickup units", have boosted appearance rates, and offer bonus points if used in Extra Ops events. The oldest units are eventually removed, most commonly re-appearing in the Shops.

MSA crank Medal
Prize MSA rarity Super Rare
80x
MSA rarity Super Rare
30x
MSA rarity Super Rare
10x
MSA rarity Rare
30x
MSA rarity Rare
10x
MSA item V -qstn-
1x
MSA item IV -qstn-
1x
Odds 1.32% 6.57% 18.405% 12.097% 34% 4.818% 22.789%
* Odds are approximations, and may be subject to frequent change.


VIP Crank

MSA banner crank VIP 1.2.0
★ Perform "10 PLAYS" to be sure to get at least respectively more than one SR Unit and Platinum item.

This crank is unlocked upon reaching VIP Level 11 (20,000 VIP EXP) and offers a free spin every 24 hours [as of 1.3.0] after reaching VIP Level 14 (80,000 VIP EXP). It's very similar to the regular Medal Crank, with the same cost-per-play and prize list: however, its odds are re-weighted and a 10x spin guarantees a platinum item in addition to the usual 80-part Super Rare icon. Despite this, it still averages a slightly higher Super Rare part output.

MSA crank VIP
Prize MSA rarity Super Rare
80x
MSA rarity Super Rare
30x
MSA rarity Super Rare
10x
MSA rarity Rare
30x
MSA rarity Rare
10x
MSA item V -qstn-
1x
MSA item IV -qstn-
1x
Odds 1.32% 7.89% 26.295% 8.947% 27.7% 9.636% 18.226%
* Odds are approximations, and may be subject to frequent change.


Event Crank

MSA banner crank Event 1.3.0
★ Play 10 times in order to get at least 30 parts of 2 SR Units.

First appearing in 1.3.0, this crank drops units exclusively and at a cheaper price than the Medal Crank: 200 medals for a single spin, or 1,800 for ten spins at a time. Units of *all* rarities are available - even those available in the MSP Crank. Performing a 10x spin guarantees the appearance of at least two 30-part Super Rare icons.

The Event Crank is only available during limited time periods, and typically has a new prize list every time it surfaces (based upon a theme, often involving units that aren't available elsewhere). In some cases, one of the two 30x Super Rare icons may even be guaranteed to be for a specific unit. The overall rate of Super Rare parts per medal tends to be (barely) higher than that of the Medal Crank, however, the 80x Super Rare icons from the Medal Crank tend to be more immediately useful.

MSA crank Event
Prize MSA rarity Super Rare
30x
MSA rarity Super Rare
10x
MSA rarity Rare
30x
MSA rarity Rare
10x
MSA rarity Normal
10x
MSA rarity Normal
5x
Odds 3.564% 15.59% 4.014% 40.086% 3.34% 33.41%
* Odds are approximations, and may be subject to frequent change.


Box Crank

MSA banner crank Box 2.0.0

Introduced in 2.0.0, the Box Crank is a new crank added to the game. Like the Event Crank, it's only available during limited-time events, with a different prize list upon each appearance. Plays are performed solely as 10x spins for 800 medals, although the first pull is free. The Box Crank only contains unit parts (any rarity), although the first also contained platinum and gold items.

Uniquely, all prize icons have equal odds, and are removed from the 250-icon prize pool as they appear, meaning that twenty-five 10x pulls will obtain the full set. However, at any time the player may "reset the box", reverting the pool back to its original state. This is obviously best done once the best prizes have been removed.

Each Box Crank typically features a new "exclusive" unit which cannot be obtained via any other method. The prize pool initially contains five icons offering a combined 60 parts for this unit - one 30x, two 10x, and two 5x. As 80 parts are required to unlock, this means that the box has to be reset at least once in order to collect a sufficient quantity.

Most such units have come with a clause noting that they will not appear on the "next" Box Crank - these "limited edition" units haven't appeared on any following cranks, and it's unknown as to when (or even if) they'll be unlockable again. Only the first five Box Crank units (White Baby, Jin, Rumi, Veronica, and Navy) have made repeat appearances.

Assuming the box is reset every time the featured unit's 30x icon appears, an average of about 20,000 medals is required to unlock it (with a standard deviation of about 5,000 medals). A slightly more efficient approach (lowering the average by several hundred medals) is to reset every time the total parts removed from the pool exceeds the number of icons removed, times 6 and divided by 25. It's recommended not to try for a featured Box Crank unit unless you're prepared to spend at least 30,000 medals in the process (and there's still around a one-in-thirty chance that you'll need more).

For every 100 spins (or 8,000 medals spent), a special avatar is rewarded to the player. Limited-edition Box Cranks have a special emerald icon which requires 770 spins.

MSA crank Box
Prize MSA rarity Super Rare
30x
MSA rarity Super Rare
10x
MSA rarity Super Rare
5x
MSA rarity Rare
30x
MSA rarity Rare
20x
MSA rarity Rare
10x
MSA rarity Rare
5x
MSA rarity Normal
10x
Odds 6.4% 8.8% 2.8% 3.2% 3.2% 3.2% 3.2% 69.2%
* Odds are approximations, and change the moment you spin the crank.


The Genie

Genie

When spinning any crank, there is a chance that the Genie will appear before your icons are revealed. Although he doesn't grant any additional prizes, his presence does give some indication as to the value of the prizes you're about to receive.

To trigger the Genie, at least one icon won must grant the exact amount of parts required to unlock a corresponding unit. For example, an 80x Cleopatra icon will summon the Genie; whereas with a unit such as Christmas Fio or the Deformed Slug Gunner, a 10x icon is required instead (as in, as opposed to an 80x icon).

In the Box Crank, the Genie appears differently compared to the Medal/MSP Cranks. He will only appear if the player manages to roll for the featured Box Crank unit's parts (5x or 10x). If the player rolls a 30x instead, the Genie will initially attempt to appear normally, before it returns as a Golden Genie.

Metal Slug Attack
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 | Special Ops
Features Level and EXPVIP | Build UpUnitsby IconTeamsStatsItems | GuildList of Guild Raid Stages | Daily LoginDaily QuestsEvents | Power-Ups | Mystery CrankTreasure Hunt | Shops
Extras Patch Notes

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