˅˃ Ops Types
(Active) |
| Marathon |
| Rare Boss |
| United Front |
| Try Line |
| Task Force |
| Recapture |
˅˃ Ops Types
(Defunct) |
| Score Attack |
| Daily Ranked |
| Crank Key |
| Snatch Wars |
United Front the 20th is the one hundred and fifty-fourth Extra Ops introduced in Metal Slug Attack.
Story[]
On Earth, the Regular Army is preparing for an operation against the Martians who are planning another attack on Earth. Gisee wonders where Midori has went, as she is late.
At the base, Midori is seen with Fio and their newest recruit Growl. Fio reminds Growl what they need to do; participate and obtain the shinies. Midori giggles as she believes Marco assigned him to her because of her features. Fio mistakes this as her physical features and goes into a full on panic as Growl leaves the base to face the enemy.
Growl soon encounters Marty and Tank and challenges them to a fight. The two Martians are somehow able to understand him and accepts his challenge. Growl defeats both of them, with Tank commenting on how pure and sparkling his soul is. Marty further supports Tank's statement as it knows there are good people on Earth. They bid farewell to Growl, promising not to lose in their next encounter.
With the operation over, Roberto informs Fio that the United Shop will close soon. Fio wonders where Midori and Growl went, just as Midori finds Growl returning to base. Growl simply states "sparklies" and Midori misinterprets it as him asking where the United Shop is. Midori soon notices that Growl is pointing and referring to her as a "sparkly".
Introduced Units[]
| Units | Faction | Rarity |
|---|---|---|
| Growl | 
|
|
| Everlasting Summer Alice |
|
|
| Golden Gigantalos | 
|
|
| Mars People Tank(Ver.Gold) |
|
|
Expert Units[]
| Expert Units |
Get Unit |
|
|||||
|---|---|---|---|---|---|---|---|
| Step Up Crank |
✓ |   60%
|
120%
|
200%
| |||
| Pre-Acquisition |
✓ | 30%
|
45%
|
60%
|
75%
| ||
| Pick Up!! |
✓ | 15%
|
20%
|
25%
|
30%
| ||
| Extra Ops (Previous) |
✓ | 10%
|
15%
|
20%
| |||
| United Shop |
✓ | 6%
|
9%
|
12%
|
15%
| ||
| ✓ | 2%
|
3%
|
4%
|
5%
|
6%
|
Stages[]
Solo Attack[]
| Difficulty | Enemies | 
|
|
|---|---|---|---|
|
10 | 100 | |
|
20 | 220 | |
|
30 | 360 |
Party Attack[]
| Difficulty | Enemies |
|
|
|---|---|---|---|
|
20 | 200 | |
|
40 | 440 | |
|
80 | 960 |
United Battle[]
| Difficulty | Enemies |
|
|
|---|---|---|---|
| N/A | Random (other players' deck x2) | 50 | 750 |
Shop[]
Apart from the MSP, each purchase is one-time only.
Daily Update[]
Each stock can only be bought once a day, resetting at 12:00 JTC.
| Items |
|
|---|---|
    |
500 |
 |
1,000 |
 |
2,000 |
Golden Gigantalos[]
| Items |
|
Quantity |
|---|---|---|
| 40,000 | 1 | |
| 150,000 | 1 | |
| 600,000 | 1 | |
   |
18,000 | 3 |
 |
12,000 | 3 |
 |
6,000 | 3 |
 |
3,000 | 3 |
Mars People Tank(Ver.Gold)[]
| Items |
|
Quantity |
|---|---|---|
| 15,000 | 1 | |
| 30,000 | 1 | |
| 60,000 | 1 | |
| 90,000 | 1 | |
 |
3,000 | 3 |
 |
2,250 | 3 |
 |
1,500 | 3 |
 |
750 | 3 |
Avatar Icon[]
| Items |
|
|---|---|
| Golden Gigantalos | 7,500 |
| Mars People Tank(Ver.Gold) | 7,500 |
| Mars People Tank(Ver.Gold) Avatar | 7,500 |
| Clone Abby and Clone Betty | 7,500 |
Miscellaneous Items[]
| Items |
|
Quantity |
|---|---|---|
 |
7,500 | 4 |
 |
800 | 3 |
 |
1,500 | 3 |
 |
2,000 | 3 |
 |
400 | 3 |
 |
1,500 | 3 |
Limitless[]
Unlimited amounts of MSP can be bought from the shop at any time during the duration of the event.
| Items |
|
|---|---|
 10,000 |
50 |
| 100,000 |
500 |
| 1,000,000 |
5,000 |
| 10,000,000 |
50,000 |
Milestones[]
Solo Attack - Party Attack - United Battle
| Points | Rewards | Total Rewards | ||||||
|---|---|---|---|---|---|---|---|---|
|
|
|
|
|
|
| ||
| 1,000 |  |
1,000 | ||||||
|---|---|---|---|---|---|---|---|---|
| 5,000 | 100,000 
|
100,000 | 1,000 | |||||
| 10,000 |  |
100,000 | 1,000 | 500 | ||||
| 20,000 | 200,000
|
300,000 | 1,000 | 500 | ||||
| 30,000 |  |
300,000 | 1,000 | 500 | 500 | |||
| 50,000 | 300,000
|
600,000 | 1,000 | 500 | 500 | |||
| 100,000 |  |
600,000 | 1,000 | 500 | 500 | 500 | ||
| 200,000 | 400,000
|
1M | 1,000 | 500 | 500 | 500 | ||
| 300,000 | |
1M | 2,000 | 500 | 500 | 500 | ||
| 400,000 | 500,000
|
1.5M | 2,000 | 500 | 500 | 500 | ||
| 500,000 | |
1.5M | 2,000 | 1,000 | 500 | 500 | ||
| 600,000 | 600,000
|
2.1M | 2,000 | 1,000 | 500 | 500 | ||
| 700,000 | |
2.1M | 2,000 | 1,000 | 1,000 | 500 | ||
| 800,000 | 700,000
|
2.8M | 2,000 | 1,000 | 1,000 | 500 | ||
| 900,000 | |
2.8M | 2,000 | 1,000 | 1,000 | 1,000 | ||
| 1M | 800,000
|
3.6M | 2,000 | 1,000 | 1,000 | 1,000 | ||
| 1.1M | |
3.6M | 3,500 | 1,000 | 1,000 | 1,000 | ||
| 1.2M | 900,000
|
4.5M | 3,500 | 1,000 | 1,000 | 1,000 | ||
| 1.3M | |
4.5M | 3,500 | 1,500 | 1,000 | 1,000 | ||
| 1.4M | 1M
|
5.5M | 3,500 | 1,500 | 1,000 | 1,000 | ||
| 1.5M | |
5.5M | 3,500 | 1,500 | 1,000 | 1,000 | 1 | |
| 1.6M | |
5.5M | 3,500 | 1,500 | 1,500 | 1,000 | 1 | |
| 1.7M | 1.1M
|
6.6M | 3,500 | 1,500 | 1,500 | 1,000 | 1 | |
| 1.8M | |
6.6M | 3,500 | 1,500 | 1,500 | 1,500 | 1 | |
| 1.9M | 1.2M
|
7.8M | 3,500 | 1,500 | 1,500 | 1,500 | 1 | |
| 2M | |
7.8M | 5,000 | 1,500 | 1,500 | 1,500 | 1 | |
| 2.1M | 1.3M
|
9.1M | 5,000 | 1,500 | 1,500 | 1,500 | 1 | |
| 2.2M | |
9.1M | 5,000 | 2,000 | 1,500 | 1,500 | 1 | |
| 2.3M | 1.4M
|
10.5M | 5,000 | 2,000 | 1,500 | 1,500 | 1 | |
| 2.4M | |
10.5M | 5,000 | 2,000 | 2,000 | 1,500 | 1 | |
| 2.5M | 1.5M
|
12M | 5,000 | 2,000 | 2,000 | 1,500 | 1 | |
| 2.75M | |
12M | 5,000 | 2,000 | 2,000 | 2,000 | 1 | |
| 3M | |
12M | 5,000 | 2,000 | 2,000 | 2,000 | 2 | |
| 3.25M | |
12M | 7,000 | 2,000 | 2,000 | 2,000 | 2 | |
| 3.5M | |
12M | 500 | 7,000 | 2,000 | 2,000 | 2,000 | 2 |
