Project X
Project X
Locker level 3
Favorite target Defensive Towers
Attacks ground yes
Attacks air no
Special ability Acid Spores

" A government experiment gone terribly wrong, Project X is programmed to attack defense towers in battle. "

Old project X

Original Project X Design

General Information

Project X is a powerful monster with high attack damage and low health. It is currently one of the monsters with the highest damage in Backyard Monsters, surpassed only by a D.A.V.E. when at level 1 and 2, King Wormzer at level 4 or higher, and Eye-ra at any level.

Project X was commonly used with 10M Putty Rage in an attack strategy called PPX, until it was nerfed in an update.


Project-X Acid Spores

Project X's Special ability: Acid Spores

Project X's special ability is called Acid Spores. Upon death, Project X will release a pool of acid that will damage any buildings or monsters that come in contact with it.

At the moment, the acid seems to be nothing more than the normal blood around the area where Project X dies.


Level 1 2 3 4 5 6
Movement speed 0.90 kph 0.90 kph 1.00 kph 1.20 kph 1.20 kph 1.30 kph
Health 800 900 950 1,000 1,100 1,200
Damage 1,200(2,400) 1,400(2,800) 1,600(3,200) 1,800(3,600) 2,000(4,000) 2,200(4,400)
Goo cost 60,000 90,000 135,000 180,000 234,000 280,000
Goo cost MR3 180,000 270,000 405,000 540,000 702,000 840,000
Housing space 70 70 70 70 70 70
Production time 23m 4s 23m 4s 23m 4s 23m 4s 23m 4s 23m 4s
Production time MR3 1h 9m 12s 1h 9m 12s 1h 9m 12s 1h 9m 12s 1h 9m 12s 1h 9m 12s
Upgrade cost (putty) 4,096,000 4,096,000 7,000,000 12,000,000 18,000,000 24,000,000
Upgrade time 2d 14h 1d 1d 12h 2d 4d 4d 12h
Attack to housing ratio 17.1 20 22.9 25.7 28.6 31.4
Health to housing ratio 11.4 12.9 13.6 14.3 15.7 17.1


  • Despite its monster-like appearance, it seems as if it was initially a plant prior to governmental acts.
  • Along with Bolt and D.A.V.E. the in-game sprite of Project X was updated with the design. Most original monsters were not updated; the sprites who look like the picture were added after the design change.
  • Project X had its description changed thrice (during beta, and after beta), with the second description adding hell bent on.
  • Project X is the only monster that attacks Defensive towers that focuses on Attack rather than Health


Moved to Project X/tips

Locker Level 1 Monsters
40px-Pokey Pokey Octo-ooze Octo-ooze Bolt Bolt Fink Fink
Locker Level 2 Monsters
Ichi Ichi Eye-ra Eye-ra Bandito Bandito FangFang VorgVorg
Locker Level 3 Monsters
Brain Brain Slimeattikus Slimeattikus Crabatron Crabatron Project X Project X Zafreeti Zafreeti
Locker Level 4 Monsters
Teratorn Teratorn Wormzer Wormzer D.A.V.E. D.A.V.E.

Earned Monsters

Strongbox Level 1 Monsters
Spurtz Spurtz Zagnoid Zagnoid
Strongbox Level 2 Monsters
Valgos Valgos Malphus Malphus
Strongbox Level 3 Monsters
Balthazar Balthazar Grokus Grokus Sabnox Sabnox
Strongbox Level 4 Monsters
King Wormzer King Wormzer

Champion Monsters
Drull 6 Drull Gorgo 6 Gorgo Fomor 6 Fomor Korath 6 Korath Krallen sprite1 Krallen

Community content is available under CC-BY-SA unless otherwise noted.