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Mutation War is the 17th Extra Ops introduced in Metal Slug Attack.

Story:

The Rebel Army finished the creation of their new weapon: "Huge Hermit", but just after it goes out of control and start attacking the Morden troops. They made a barricade to stop it advancement, but is useless against it giant claws, and when is near to kill the soldiers, a enraged Allen O'Neil comes to the rescue, knocking back it and rushing it.

At the end, Allen destroyed the Huge Hermit, but a bit later he fall tired to the sea, and the infantry jumps to water to save them. Meanwhile, on a field, a very known armed tower is ready for it mission.

Introduced Units:

Unit Rarity Available?
MSA unit Allen O'Neil (Wrath) III-stock MSA rarity Super Rare Yes, via Medal/VIP Crank
MSA unit Huge Hermit III-stock MSA rarity Super Rare No
MSA unit Tyra Elson II-stock MSA rarity Rare Yes, via Medal/VIP Crank
MSA unit Mini Caterpillar II-stock MSA rarity Rare No


Event Stage Breakdown:

Expert Units

EXPERT

UNITS
GET

UNIT
MSA event power increase MSA unit --- I-stock MSA unit --- II-stock MSA unit --- III-stock MSA unit --- IV-stock MSA unit --- V-stock
MSA unit Allen O'Neil (Wrath) III-stockPre-

Acquisition
MSA event points increase40%MSA event points increase80% MSA event points increase120%
MSA unit Allen Jr. III-stockPICK UP!! MSA event points increase20%MSA event points increase40% MSA event points increase60%
MSA unit Tyra Elson II-stockPack

Shop
MSA event points increase10% MSA event points increase15%MSA event points increase20% MSA event points increase25%
MSA unit Union III-stockExtra Ops

(Previous)
MSA event points increase5%MSA event points increase10% MSA event points increase15%
MSA unit Mini Caterpillar II-stockReward MSA event points increase6% MSA event points increase9%MSA event points increase12% MSA event points increase15%
MSA unit Ohumein-Conga (Red) II-stockReward MSA event points increase6% MSA event points increase9%MSA event points increase12% MSA event points increase15%
MSA unit Chowmein-Conga I-stockReward MSA event points increase2% MSA event points increase4% MSA event points increase6%MSA event points increase8% MSA event points increase10%
MSA unit Huge Locust I-stockReward MSA event points increase2% MSA event points increase4% MSA event points increase6%MSA event points increase8% MSA event points increase10%


Milestones

MSA currency Exclusive Points MSA currency MSP MSA currency Medal MSA unit Ohumein-Conga (Red) part MSA unit Huge Locust part MSA unit Mini Caterpillar II-stock MSA unit Huge Hermit III-stock
100 500,000
1,000 10
1,500 100,000
2,000 5
2,500 10
3,000 50
3,500 10
4,000 200,000
4,500 10
5,000 5
6,000 10
7,000 300,000
8,000 10
9,000 350,000
10,000 10
12,500 20
15,000 400,000
17,500 10
20,000 500,000
22,500 10
25,000 600,000
27,500 10
30,000 10
35,000 10
40,000 700,000
45,000 10
50,000 10
55,000 15
60,000 750,000
65,000 15
70,000 50
75,000 800,000
80,000 10
85,000 850,000
90,000 50
95,000 10
100,000 900,000
110,000 50
120,000 10
130,000 5
140,000 1,000,000
150,000 10
160,000 50
170,000 1,200,000
180,000 5
190,000 10
200,000 1,500,000
210,000 10
220,000 50
230,000 2,000,000
240,000 20
250,000 10
260,000 2,500,000
270,000 20
280,000 3,000,000
290,000 50
300,000 20
310,000 10
320,000 3,500,000
330,000 50
340,000 20
350,000 10
360,000 4,500,000
370,000 50
380,000 20
390,000 10
400,000 4,500,000
410,000 50
420,000 20
430,000 10
440,000 5,000,000
450,000 50
460,000 20
470,000 10
480,000 5,500,000
490,000 50
500,000 20

Mission Breakdown

Stages "Normal"

Stages / DifficultyMSA difficulty 3-Normal MSA currency Sortie Points small Enemies

Items /
Trophy of War

MSA Tied P.O.W. MSA currency Exclusive Points Base
HP
Stage 1
6

Man Eater

Big Snail

(level 1, iron, skill 0)

MSA unit Ohumein-Conga (Red) part MSA item III Mutated Frog
MSD currency MSP 12,000

3 100 10,000
Stage 2
7

Man Eater

Sasquatch

Native

(2-i-0)

MSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 14,000


3

130

10,000
Stage 3
8

Ohumein Conga

Chowein Conga

Mutated Soldier

Big Snail

(3-i-0)

MSA unit Huge Locust part MSA item III Mutated Frog
MSD currency MSP 16,000

3 160 10,000
Stage 4
9

Ohumein Conga

Chowein Conga

Huge Locust

(4-i-0)

MSA unit Chowmein-Conga partMSA unit Huge Locust part MSA item III Mutated Frog
MSD currency MSP 18,000
3 190 10,000
Stage 5
10

Mini Caterpillar

Huge Locust

Mini Hermit

Mutated Soldier

Bear

(5-i-0)

MSA unit Ohumein-Conga (Red) partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 20,000
3 220 ?
Stage 6
11

Man Eater

Big Snail

Ohumein Conga

Native

(6-i-0)

MSA unit Ohumein-Conga (Red) partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 22,000
3 250 20,000
Stage 7
12

Man Eater

Big Snail

Mini Hermit

Native

Ohumein Conga

(7-b-1)

MSA unit Chowmein-Conga partMSA unit Huge Locust part MSA item III Mutated Frog
MSD currency MSP 24,000
3 280 20,000
Stage 8
13

Native

Ohumein Conga

Mini Caterpillar

(8-b-1)

MSA unit Huge Locust partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 26,000
3 310 20,000
Stage 9
14

Native

Ohumein Conga

Caterpillar

(9-b-1)

MSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 28,000
3 340 20,000
Stage 10
15 ? MSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 30,000
3 370 ?


Stages "Hard"

Stages / DifficultyMSA difficulty 4-Hard MSA currency Sortie Points small Enemies

Items /
Trophy of War

MSA Tied P.O.W. MSA currency Exclusive Points Base
HP
Stage 1
16

Man Eater

Big Snail

Sasquatch

Huge Locust

(16-s-2)

MSA unit Ohumein-Conga (Red) part MSA item III Mutated Frog
MSD currency MSP 32,000

4 400 10,000
Stage 2
17

Man Eater

Huge Locust

Native

(17-s-2)

MSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 34,000


4

430

10,000
Stage 3
18

Ohumein Conga

Chowein Conga

Mutated Soldier

Big Snail

Caterpillar

Dangling Snail

(18-s-2)

MSA unit Huge Locust part MSA item III Mutated Frog
MSD currency MSP 36,000

4 460 10,000
Stage 4
19

Ohumein Conga

Chowein Conga

Mini Caterpillar

Caterpillar

(19-s-2)

MSA unit Ohumein-Conga (Red) partMSA unit Huge Locust part MSA item III Mutated Frog
MSD currency MSP 38,000
4 490 10,000
Stage 5
20

Mini Caterpillar

Huge Locust

Mini Hermit

Chariot

Caterpillar

Dangling Snail

(20-s-2)

MSA unit Ohumein-Conga (Red) partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 40,000
4 520 ?
Stage 6
21

Man Eater

Big Snail

Ohumein Conga

Native

Mini Caterpillar

(21-g-3)

MSA unit Ohumein-Conga (Red) partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 42,000
4 550 20,000
Stage 7
22

Big Snail

Native (Bird)

Native

Ohumein Conga

Caterpillar

Mini Caterpillar

(22-g-3)

MSA unit Huge Locust partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 44,000
4 580 20,000
Stage 8
23

Mini Caterpillar

Ohumein Conga

Native

(23-g-3)

MSA unit Huge Locust partMSA unit Mini Caterpillar II-stock MSA item IV Mutated Crab
MSD currency MSP 46,000
4 610 20,000
Stage 9
24

Caterpillar

Mini Caterpillar

Ohumein Conga

Native

(24g-3)

MSA unit Mini Caterpillar II-stock MSA item IV Mutated Crab
MSD currency MSP 48,000
4 640 20,000
Stage 10
25 ? MSA unit Mini Caterpillar II-stock MSA item IV Mutated Crab
MSD currency MSP 50,000
4 670 ?


Stages "Hell"

Stages / DifficultyMSA difficulty 6-Hell MSA currency Sortie Points small Enemies

Items /
Trophy of War

MSA Tied P.O.W. MSA currency Exclusive Points Base
HP
Stage 1
26

Man Eater

Big Snail

Sasquatch

Huge Locust

(36-p-4)

MSA unit Ohumein-Conga (Red) part MSA item III Mutated Frog
MSD currency MSP 52,000

5 700 10,000
Stage 2
27

Man Eater

Sasquatch

Huge Locust

Native (Bird)

(37-p-4)

MSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 54,000


5

730

10,000
Stage 3
28

Ohumein Conga

Chowein Conga

Mutated Soldier

Big Snail

Mini Caterpillar

Dangling Snail

(38-p-4)

MSA unit Huge Locust part MSA item III Mutated Frog
MSD currency MSP 56,000

5 760 10,000
Stage 4
29

Ohumein Conga

Chowein Conga

Mini Caterpillar

Caterpillar

(39-p-4)

MSA unit Huge Locust partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 58,000
5 790 10,000
Stage 5
30

Mini Caterpillar

Huge Locust

Mini Hermit

Chariot

Caterpillar

Dangling Snail

(40-p-4)

MSA unit Ohumein-Conga (Red) partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 60,000
5 820 ?
Stage 6
31

Man Eater

Big Snail

Ohumein Conga

Native (Bird)

Caterpillar

Mini Caterpillar

(41-p-4)

MSA unit Ohumein-Conga (Red) partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 62,000
5 850 20,000
Stage 7
32

Big Snail

Native (Bird)

Native

Ohumein Conga

Caterpillar

Mini Caterpillar

(42-p-4)

MSA unit Huge Locust partMSA unit Mini Caterpillar II-stock MSA item III Mutated Frog
MSD currency MSP 64,000
5 880 20,000
Stage 8
33

Mini Caterpillar

Caterpillar

Ohumein Conga

Native (Bird)

Chariot

(43-p-4)

MSA unit Huge Locust partMSA unit Mini Caterpillar II-stock MSA item IV Mutated Crab
MSD currency MSP 66,000
5 910 20,000
Stage 9
34

Caterpillar

Mini Caterpillar

Ohumein Conga

Native

(44-p-4)

MSA unit Mini Caterpillar II-stock MSA item IV Mutated Crab
MSD currency MSP 68,000
5 940 20,000
Stage 10
35 ? MSA unit Mini Caterpillar II-stock MSA item IV Mutated Crab
MSD currency MSP 70,000
5 970 ?


Event Items:

MSA unit Huge Hermit III-stock Huge Hermit
Icon Name Stat Effects Components
MSA item III Mutated Frog Mutated
Frog

Prod +5
HP +200
Resist +5
Mov +0.05

×
MSA item IV Mutated Crab Mutated
Crab

Prod +10
HP +500
Resist +10
Mov +0.10

x10: MSA item III Medicine x50: MSA item I Crab x30: MSA item III Mutated Frog

MSA item V Mutated Snake Mutated
Snake

Prod +15
HP +1,000
Resist +20
Mov +0.20

x75: MSA item I Snake x30: MSA item III Mutated Frog x20: MSA item IV Mutated Crab

MSA item V Temporary Armor Temporary
Armor

Prod +20
HP +1,500
Resist +30
Mov +0.30

x1: MSA item V Emblem (Blue) MSA item V Pants x3: MSA item V Mutated Snake

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

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