˅˃ Ops Types
(Active) |
| Marathon |
| Rare Boss |
| United Front |
| Try Line |
| Task Force |
| Recapture |
˅˃ Ops Types
(Defunct) |
| Score Attack |
| Daily Ranked |
| Crank Key |
| Snatch Wars |
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This article or section includes content that was defunct or not available in the present versions of Metal Slug Attack. It merely exists for archival only. |
Crank Key was an Extra Ops type introduced in Metal Slug Attack.
Overview[]
The rarest type of Extra Ops, players fight against mass-produced enemy units. The amount of targets can be chosen before the battle begins, up to a maximum of 50 per play - this increases the amount of points earned (measured simply in kills), but has little bearing on the actual difficulty, as the enemies are very weak. Given that the sortie cost-per-play is the same regardless, it's always best to gun for the maximum number of targets possible.
There are two sets of rewards granted for obtaining certain kill-counts, based on Personal and Total scores. Personal rewards include Medal and VIP crank keys, allowing for free tries on the Mystery Crank. Total rewards are given to every participant once target kill counts are achieved by all players combined, and typically include massive amounts of MSP, moderate amounts of medals, and new avatar icons.
It is advised to save 10 of each crank key if possible, as they can then be used on the Mystery Crank together to guarantee an 80-part Super Rare icon, and, if using VIP keys, a platinum item.
| Extra Ops | Version | Target Unit |
|---|---|---|
| Jupiter King's Extra Ops | 1.8.0 | |
| The King of Weapons | 1.11.0 | |
| Food Army! | 1.16.1 | |
| Merry Christmas! | 1.18.0 | |
| Food Army! 2nd | 1.19.0 | |
| Chocolate of the Dead | 1.20.0 | |
| Jungle Monkeys | 2.4.0 |
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| Game Modes | Another Story | Attack! • List of Standard Missions • List of Elite Missions | Battle and Team Battle | Combat School | Extra Ops / Guild Ops • List of Extra Ops | Online | P.O.W. Rescue | Rank Match | Special Ops | Ultimate Mission | Battle Tactics | ||||||||
| Features | User Profile | Level and EXP | VIP | Build Up • Laboratory | Units • by Icon • Teams • Unobtainable | Stats | Items • by Stats • Special Items • Status Strengthening • Event Items | Guild • List 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 | Music | Update History | Event Schedule | ||||||||