Submarine Alliance

“	Join forces with the Monkey Subs and defeat the ZOMG bloon. Doing so will unlock the Monkey Sub for use in your city!	”
	~ Bloons Monkey City Mobile level description

The initial setup of the mission

Submarine Alliance is a special mission that is only available in Bloons Monkey City Mobile. There are 4 1/1 Subs defending a broken 2/4 Sub. The player's job is to repair it for $8000. There isn't much land or track in either direction and there are 15 rounds, so good luck. Also this mission internally starts at Round 4, so harder bloons come early. There's a ZOMG at the end, hence the urgency to repair the 2/4 sub (however this is not a must because if you farm greedily with higher level, you can beat it with other anti-MOAB strategies), but there are also MOABs in the way. Bloons travel towards the broken Sub at the middle with 2 paths. Also, the ZOMG is not the only bloon in round 15. When reaching round 15, players should get correct timing to destroy the ZOMG otherwise the player will lose. You can also set the 2-4 sub to prioritize Strong to ensure that the ZOMG gets hit. Completing this tile earns 500 XP, at least 200 and 5.

Damaged 2-4 Sub icon

Strategies

General Notes

Round 14 and 15 are by far the hardest in the mission, with possible MOAB spawns on round 14 and with a ZOMG, multiple MOABs and loads of ceramics on round 15. The best way to beat it is to ignore the ZOMG and put all funds into defenses to destroy the other bloons (which are much faster). The ZOMG will be the only bloon remaining, and so all the other towers can be sold to repair the submarine and instantly destroy the ZOMG. This also removes the risk of the First Strike missile hitting the wrong bloon. A much easier way to remove that risk is to put the targeting of the Sub to strong and fire at the ZOMG when there are no bloons in the way. The best possible scenario is to fire the missile when one of the round 15 MOABs is over the ZOMG, which will destroy both the MOAB and the ZOMG (as shown in some YouTube videos).

Strategies

WyzZero's - Relaxed Strategy

I ran through this strategy several times to get it perfect and the best part is that until the last round, all placements and upgrades can be made between rounds. I was able to complete this with $3,450 starting cash. This can vary depending on knowledge unlocked. This strategy uses the following (including upgrade levels):

• Spike Factories (3/2) - Knowledge Level 3
• Monkey Buccaneer (2/3) - Knowledge 2
• Glue Gunner (2/1) - Knowledge 2
• Boomerang Throwers (3/2) - Knowledge Level 3

Also, Bloon Sabotage is Rank 3 and I had the Enchanted Boomerang and Extra-Sticky Substance at the time of completing this.

During initial Prep, place 2 Spike Factories (0/0), 1 each at the top of the left island and the bottom of the right island (both along the track running down the center). Also, place 2 Boomerang Throwers (2/0) near the Spike Factories (I positioned them so the edge of their range ran along the curve of the track).

The Numbers below will indicate to initiate the Round, text after each number indicate building/upgrades that need to be done prior to the next round. As mentioned previously, all building/upgrades can be done between rounds until the final round.

WyzZero - Relaxed StrategySubmarine Alliance(Round 15 Prep)

1. Upgrade both Boomerang Throwers to (2/2)
2. No upgrades Needed
3. Upgrade both Spike Factories to (1/0)
4. Upgrade both Spike Factories to (1/1)
5. Upgrade Left Boomerang Thrower to (3/2)
6. Upgrade Right Boomerang Thrower to (3/2)
7. Upgrade both Spike Factories to (2/1)
8. Upgrade Left Spike Factory to (3/1)
9. Upgrade Right Spike Factory to (3/1)
10. Build and upgrade 2 Monkey Buccaneers (2/1) in the middle, 1 along the edge of each island.* For this, I tried to position them so that after upgrading range, it's range reached along the curve of the tracks.
11. Upgrade both Monkey Buccaneers to (2/3)
12. Upgrade both Spike Factories to (3/2)
13. Build and Upgrade 2 Glue Gunners (2/1) near the beginning of the track, 1 on each island.
14. You made it through 14 rounds and should now have more than $8000 and full life. It is time to Repair the Submarine! Round 14 can get a little tricky, so I recommend changing the speed to slow, as you will actually be building during this round. Also, your starting cash can vary, but I found by using the glue gunners in Round 13 (my strategy previously didn't include them), my cash to start round 15 increased by $1,100 compared to my previous attempts (see note from round 10). Once the upgrade of the Submarine is complete, I had just short of $2000, which I used on building and upgrading 2 more Spike Factories placed near the end of the track on both islands (another couple Boomerang Throwers or Buccaneers may also be good options with good placement).
15. Once you start round 15, wait until the ZOMG appears. As soon as it appears, hit the Submarine's ability, which will launch a missile that will 1-shot the ZOMG. You've just been given a ton of cash, start building and upgrading. I was able to get my 2 new Spike Factories upgraded to both lay spike balls and began increasing production speed, and had a few close calls before completing.

Good Luck!

*Note: I kept consistent track of my money after each round, each time I re-attempted to create this strategy. For whatever reason, the cash stayed the same each round until Round 10 (ranging about a $50 difference between plays). Going forward, each round continued to vary, and it seems to have something to do with how the bloons were destroyed. On round 13, when I finally decided to try using Glue Gunners, my cash at the end of the round increased by close to $1,100.

Qwertyxp2000 the second's Spike Factory-Apprentice strategy

Plan A

Qwertyxp2000 the second's setup after Round 11

I had started off with $3850 cash. I put one Spike Factory on each side as 1/0. Then I added an 0/1 Monkey Apprentice with my spare cash. Then I added one more on the other side. Try to upgrade the Apprentices to 0/2 then 2/2. Upgrade the Spike Factories to 2/2, 1/2 first. Invest for $8000 to repair the damaged sub. (Or use Banana Farms to invest if you wish.) Then save more money and wait until Round 14.

During Round 14 there was a MOAB going left, at least in my Special Mission. Invest some more cash during the round (but preferably before, if enough cash), get a MOAB Assassin and use the ability to destroy the MOAB layer that would frustrate the defenses. Do it as soon as possible which otherwise would overwhelm the Spike Factory. Use the other defenses to get rid of the other bloons and ignore the ZOMG. Then use the First Strike Capability to destroy the ZOMG.

Plan B

Do the same thing, except after upgrading the two Spike Factories to 2/2, sell the Monkey Apprentices when the amount of cash reaches $5600, which then means you can repair the sub earlier. Perhaps also use Banana Farms to invest too, if you wish.

Other notes

During the time, I had Monkey Knowledge Packs with the capability of selling towers at 85% price. I also had all 2% discount of all base tower costs and 1% discount of all upgrade costs. I also had Monkey Apprentice base attack speed and Fireball speed increased by 5%. The Spike Factories had one extra spike per pile and 3% discount of all costs. The Bomb Shooter has $100 discount on Bigger Bombs and projectile speed increased by 10%. As for the Monkey Subs, they have a 15% increased projectile speed and 3% increased range.

Although I am not sure about Round 15, I hope the other parts of the strategy will inspire you readers.

Conclusion

A sketch of the solution before the start of Round 15. Sorry I don't have a proper screenshot of this.

In fact, my friend completed this mission for me. My friend put in 1/0 Spike Factories and some Boomerang Throwers in the first round. By Round 14, he has a Monkey Pirates at the center, two 3/2 Spike Factories, one at each end, some Glaive Riccohet and Bionic Boomer with Glaives, and the fixed center submarine. He used MOAB Takedown to pull down the single MOAB on the left. In Round 15, he used the First Strike Capability to destroy the ZOMG on the left. The left MOAB was destroyed with all of the helping towers on the left, while the right had enough supporting towers to destroy that side's bloons.

Strategy by Anonymous (doesn't work even with 3600 starting cash. Lost just after upgrading spike factory to spiked ball on round 13)

Started with 3400 cash. First put two 1-0 Spike Factories, one on each side. As Round 1 starts, buy two boomerang throwers. Upgrade them to 2-2.Next,upgrade the Factories to 2-2.Then buy a 1-1 apprentice to deal with leads(regen.).Then when you get enough cash, get 6 bomb towers. Upgrade to 2-3.Then upgrade the boomerang throwers to 2-3.Then upgrade the factories to 3-2.(really important!).All this should be done by round 14.During my mission, there was first an MOAB coming on the left, and then one on both the lanes. I dealt with that using a monkey boost(one lasted for both MOAB) rushes. Before Round 15 sell the Spiked Ball Factory on the left and the apprentices. Then repair the sub. On Round 15,The MOAB Rush pattern was repeated, with the first on overlapping the ZOMG. Destroy the ZOMG and the MOAB with First strike, and buy back your 3-2 Factory. Then use Monkey boost again to destroy more MOABs.

Tip:Make sure you got some free monkey boosts.It really helps in avoiding spending bloonstones.

ChickenBandit's Strategy

Start with a supply crate. Place 2 0-3 dart monkeys on each path

Cutterfish12345's Strategy

Introduction

I attempted this mission when I was at Level 16. This was quite difficult and I beat it with only 5 lives remaining. But this is a quite effective method.

Towers Needed

• Two 2/1 Spike Factories
• Four 2/3 Dart Monkeys
• Two 2/X Glue Gunners
• One 1/1 Sniper Monkey
• Two 2/2 Wizard Monkeys
• Two 2/X Ninja Monkeys
• Six X/3 Bomb Shooters
• Three 3/X Monkey Buccaneers
• Two 2/X Engineer Monkeys

Walkthrough

• Place 2 Spike Factories and 2 Dart Monkeys and the top and bottom ends of the islands. Place a 1/X Sniper on the right island and set it to strong.
• At Round 2, place two more Dart Monkeys near the others. Upgrade 2 to X/1.
• Until Round 4, try to upgrade all four Dart Monkeys to X/3.
• At Round 5, place two X/2 Glue Gunners.
• At Round 7, upgrade the Sniper to X/2 and Spike Factories to 2/X. The Spike Factories are utmost vital for the Lead rush.
• At Round 8, place 2 Wizards and try to upgrade them to 1/X. Set their targeting to strong.
• At Round 9, place two 2/X Ninja Monkeys.
• Then keep saving $8000 for the Sub. You would probably be able to repair it on Round 11.
• Put two X/3 Bomb Shooters on both islands. Then place two 2/X Engineers, one on each island.
• Round 14 is quite dangerous, so upgrade the Wizards to 2/X
• Try not to Fast Forward Round 15. Firstly finish of the ZOMG with the First Strike ability. Then place two 3/X Buccaneers. And place 2 more X/3 Bomb Shooters.
• Hopefully you'll finish this mission with only 90 lives lost ;).

Froggiez's Strategy

First, I was level 13 when I attempted this mission, I mainly used two 2/2 spike factory at the top and bottom, then 2 X/3 Dart Monkeys at the start of the tracks, and 3 2/2 Dartling gunners to random spots and at round 13 I started saving and didn't need to sell anything. At round 14, I also used 2 revives for the money.

Gallery

Uncaptured tile

Trivia

Above: uncaptured Submarine Alliance tile

• Apart from the ZOMG, the bloons sent vary, much like a normal tile.
• The ZOMG is the first bloon in Round 15 only coming from one side, but later in Round 15, multiple MOABs come out.

Note the sub upgrade options have been unlocked and that the sub was upgraded to 2/2.

• The 4 1/1 Subs cannot be upgraded in an initial playthrough of the level (as no research of the subs has been unlocked).
  • They can be upgraded if the player replays the level through the "My Tracks" section.
  • They still cannot be sold, however.
• There are Regen and Camo bloons in this level. When they come and what type they are is different for everyone, because Bloon Spawns vary.
• It is possible to lose no lives without spending any cash on Round 1. However, as all bloon spawns will vary, only lucky ones may lose no lives without spending any cash on Round 1.
• Completing this mission leaves no trace of on your city map leaving a normal captured Lake tile in both appearance and function.
• On the mission's info screen, the length of the mission before was 26 Rounds. Later on, the length was shortened into 15 Rounds.
• It is possible to beat this tile without repairing 2-4 Submarine on city level 37.
  • If you have enough starting cash to compete, then farm greedily as much as you can until Round 14, and spam MOAB-SHREDR Spikes or MOAB Maulers right before Round 15 starts.