Bloons Tower Defense X Wiki
Engineer Monkey


The Monkey Engineer is a tower which wields a nail gun and possesses the ability to deploy sentries automatically. The cost of the Monkey Engineer is $470.


Monkey Engineer
Sentry Turrets
Places Sentries that provide bloon defense
Tier 1
Total cost: $1,000
Unlock the challenge for this tower by unlocking 5M (Omega Tech).

Complete the challenge to unlock 3S (Sentry Drones).

Fast Engineering
Places Sentries more often
Tier 2
Total cost: $1,350
Shield Buster
Sentries shoots shield-busting projectiles
Tier 3L
Total cost: $2,100
Super Nail Gun
Nails can pop up to 8 bloons
Tier 3M
Total cost: $1,900
Cleansing Gun
Cleans and pops bad bloons
Tier 3R
Total cost: $2,450
Sentry Drones
Flying high, popping bloons fast
Total cost: $3,150
Rank 27
BP x3

EMP Grenade
Completely disable shields and static bloons
Tier 4L
Total cost: $4,600
Rank 27
BP x2

Super Sentries
Super Sentries fire much faster
Tier 4M
Total cost: $3,100
Rank 27
BP x3

Purification SMG
Clean much more bloons
Tier 4R
Total cost: $5,950
Rank 27
BP x15

Fully Controlled, automated destruction
Total cost: $16,650
Rank 51
BP x7

Disables most shields and stuns bloons
Tier 5L
Total cost: $9,600
Rank 51
BP x9

Omega Tech
The strongest tech available
Tier 5M
Total cost: $15,100
Rank 51
BP x9

Bloon Bustin' Containment Unit
Does what you'd think it does
Tier 5R
Total cost: $13,450
Rank 51
BP x25

The Machine
Activates the kill switch on all machines
Total cost: $43,650

Total BP to fully unlock: 73


  • Left path turrets shoot nails that splash on impact, hitting bloons in a small radius.
  • 3L turrets do +2 damage to shield bloons, while 4L turrets do +4 damage to shield bloons.
  • Grid-Lock affects the entire track, contrary to the ability's appearance.
  • Can pop camo with 5M and any right upgrade or stacked upgrade.
  • Can pop lead with 4S, 5S, all left upgrades, the nail gun for 3M and 4M, the nail gun and turrets for 5M, the foam from all right upgrades, and the sentries from 3S.
  • The foam from the right path upgrades can permanently remove camo, regrow and lead modifiers from affected bloons.
  • Can damage HTAs with 4S, 5S, all left upgrades, and the foam from all right upgrades.



  • Left path is great against Shield and Static bloons.
  • Middle and Stack paths have great popping power.
  • Right path can remove bloon modifiers.


  • Underwhelming until upgraded.
  • Kinda expensive.
Dart Monkey Tack Shooter
Boomerang Thrower Sniper Monkey
Ninja Monkey Bomb Shooter
Monkey Submarine Charge Tower
Glue Gunner Ice Monkey
Monkey Buccaneer Monkey Engineer
Monkey Ace Bloonchipper
Monkey Alchemist Monkey Apprentice
Monkey Village Banana Tree
Mortar Launcher Dartling Gun
Spike Factory Heli Pilot
Plasma Monkey Super Monkey