Failed Experiment

ARTICLE

ADVANCED

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Failed Experiment
Mode Appearance	Intermediate Molten Arena Challenges Boss Rush Events The Takeover (Pro) Originally: PVP Test
Wave Debut	25 Originally: 13 (The Takeover Pro)
Statistics
Base Health	9,000 (Intermediate) 4,000 (Molten Arena PVP) 2,500 (Sandbox)
Defense	50%
Speed	Above Average (4)
Cash Given	$3,960 every 25% health
Hidden?	No
Flying?	No
Ghost?	No
Lead?	No
Attributes	Stun Immune Boss Immunities: Freeze Immunity Stun Immunity Poison Slowdown Confusion Thorn Slowdown Nuke Fallout Damage DJ Booth Slowdown Defense Dropping Hacker Conversion Hacker Slowdown Slowed Immunity
Ability
Ability	Slimy Death - Upon death, spawns a Slime.
PVP
Send Cost	$2,000
Send Cost	$2,000
Wave Unlock	24
Wave Unlock	24
Economy Bonus	$-60
Economy Bonus	$-60
Send Number	1
Send Number	1
Spawn Timer	5
Spawn Timer	5
Stat Changes	5,000 Health
Stat Changes	5,000 Health

CurrentThe Takeover Event

Those failed experiments^[sic] look incredibly unstable!
Everything about this operation is incredibly unnatural!

―Commander dialogue on Wave 20 (Intermediate)

Failed Experiment incoming!
They're sending out their big guns! Let's match them!

―Commander dialogue on Wave 13 (The Takeover Event, Pro)

Description

The Failed Experiment is an enemy that appears in Intermediate mode. While it does not appear in Molten Arena PVP naturally, it can be sent by a player there. It also appears in The Takeover Event. It has a high amount of health, higher than every enemy that appeared before it, and walks at an above average speed. Additionally, it spawns a Slime upon death.

Appearance

The Failed Experiment is a humanoid with lower limbs in its rig. In place of legs, it has a tail made of a translucent green goo coming out of its damaged torso, with a large swaying spine attached to it. It has teal tumors and green veins across its body, as well as a line of stitches on its head. It is missing part of its right forearm, which reveals a large bone.

It has a death animation, where its arms will give out from under itself, making it fall to its stomach.

Strategy

• Towers with decent DPS, like the Minigunner, Crook Boss or Hunter can be used to deal with the Failed Experiment.
  • The Commander should be used to further boost the firerate of these towers.
• Upon death, the Failed Experiment will summon in a Slime.
  • This, however, is not that large of an issue as the Slime itself has a low amount of health.
• Slowing towers like the Freezer, Electroshocker and Warden can be used to slow the Failed Experiment down.
  • Do note that it is a large enemy, meaning certain forms of stalling like freezing or knockback are less effective on it.
  • Its Stun Immunity also makes stuns less effective on it.
• Railgun Tanks spawned by the Military Base can severely damage the Failed Experiment with its collision damage.
  • It can also be used to handle the hordes that spawn with it.

Gallery

Animations

• 
  Walk animation (3 May 2024 – Present)
• 
  Death animation (3 May 2024 – Present)

Converted Variants

• 
  Green variant, current version (11 June 2025 – Present)
• 
  Overclock variant, current version (11 June 2025 – Present)

Corpse Variants

• 
  Second Corpse variant, current version (12 March 2025 – Present)

Thumbnails

• 
  Failed Experiment on the game thumbnail.

Promotional Images

• 
  Failed Experiment on a promotional image.

Promotional Videos

• 
  Failed Experiment on a promotional video.

Trailers

• 
  Failed Experiment in the game trailer.
• 
  Failed Experiment in the game trailer.

Development Images

• 
  Failed Experiment on a development gif.

Renders

• 
  Failed Experiment on a render.

Miscellaneous

• 
  Failed Experiment on its Index icon.

Update History

• 3 May 2024 - v1.20.0
  • Failed Experiment added.
• 11 September 2024 - v1.31.0
  • Health increased from 2,000 to 2,500.
  • Speed increased (3.5 to 4).
  • Now is a Boss enemy when it first spawns.
• 6 November 2024 - v1.40.0
  • Failed Experiment can no longer have its defense dropped while a Boss enemy.
• 16 December 2024 - v1.46.0
  • Bug: Failed Experiment's has no animations in its Index entry.
• 9 April 2025 - v1.60.0
  • Now appears in Mid Rank PVP Test.
    • Has 4,000 health.
    • Unlocked on Wave 24.
    • Can be sent out for $2,000 in groups of 1-2.
    • Adds $-60 to economy.
    • Has a spawn timer of 2.
    • Changes the health of the Failed Experiment to 5,000 when sent.
• 23 April 2025 - v1.62.0
  • No longer appears in the PVP Test as it has been removed.
• 23 July 2025 - v1.71.0
  • Now appears in Molten Arena PVP, carrying over most of its PVP Test statistics.
    • Number sent decreased from 1-2 to 1.
• 12 September 2025 - v1.74.3a
  • Now appears in Sk8 P4rk Pro difficulty as part of The Takeover Event.
    • Has 3,000 health in Sk8 P4rk.
• 22 September 2025 - v1.74.3g
  • No longer appears in Sk8 P4rk, as it has been removed.
• 28 January 2026 - v1.84.0
  • First wave appearance changed from 20 to 25 in Intermediate mode.
  • Health increased from 2,500 to 9,000 in Intermediate mode.
  • Defense of 50% added.
  • Cash given increased from $750 to $3,960 every 25% health lost.
  • Slime removed.
  • Stun Immunity added.

Notes

Intermediate
Previous Debut	Current Debut	Next Debut
Elite Hazmat & Hidden Boss Wave 23	Failed Experiment Wave 25	Giant Boss Wave 28

Pro (The Takeover)
Previous Debut	Current Debut	Next Debut
Living Experiment & Hazmat Wave 11	Failed Experiment Wave 13	Patient Zero Wave 15