Living Experiment

ARTICLE

ADVANCED

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Living Experiment
Mode Appearance	Intermediate Challenge Trials Molten Arena Challenges Boss Rush Events The Takeover (Pro) Originally: PVP Test
Wave Debut	18 (Intermediate) 15 (Challenge Trials) Originally: 16 (Mid Rank PVP Test) 11 (The Takeover Pro)
Statistics
Base Health	2,400 (Intermediate) 3,000 (Challenge Trials & Molten Arena PVP) 1,800 (Sandbox)
Defense	30%
Speed	Below Average (2.5)
Cash Given	$850 every 25% health (Intermediate) $300 every 25% health (Challenge Trials) $1 every 25% health (Default) Originally: $625 every 25% health (Mid Rank PVP Test)
Spawned By	Patient Zero
Hidden?	No
Flying?	No
Ghost?	No
Lead?	No
Attributes	Stun Immune (Variable) Freeze Immune (Variable) Health Regen (Variable) Bloated (Variable) Aggro (Variable) 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

CurrentThe Takeover EventVersion 1

I see a Living Experiment up ahead!

―Commander dialogue on Wave 18 (Intermediate)

Is that a Living Experiment?
What is Patient Zero's creature doing here? I have to report this ASAP.

―Commander dialogue on Wave 15 (Challenge Trials)

It's a Living Experiment! I knew they were coming for me!
I will take more than this!

―Commander dialogue on Wave 11 (The Takeover Event, Pro)

Is that a living experiement^[sic]?! I didn't think they were real!
Take them out before they heal the enemies around them!

―Commander dialogue on Wave 16 (Formerly, Intermediate)

Description

The Living Experiment is an enemy that appears in Intermediate, Challenge Trials and Molten Arena PVP modes. It also appears in The Takeover Event. It has a high amount of health, a below average speed and a decent amount of defense. Additionally, when it first spawns, it is a boss enemy, making it fully or partially immune to multiple forms of stalling. On some waves, it also spawns with various immunities, making it harder to kill.

Due to a bug, Living Experiments with the Slime attribute do not spawn the Slime upon death.

Appearance

The Living Experiment is a large humanoid with a waist, lower arms and lower legs in its rig. It has a light green skin color, and wears a tattered light blue hospital gown with a stitched seam going down the back, white bandages wrapped across its torso and metal plating with a glowing green piston on its back.

It has a thin right arm with an armband with chains on it, as well as a large bionic arm with multiple glowing green pistons and a green glass container. It also has a large metal neck-guard with glowing green parts, as well as glowing green eyes, patches of black hair and a metal device with green lights and light brown stitch lines surrounding it on its head.

It has a death animation, where it falls forward, with its bionic arm completely detaching in the process. The death animation is also accompanied by a sound, consisting of it grunting and metal thumping noises.

Strategy

• Towers with decent DPS, like the Minigunner, Militant or Cowboy are recommended against this.
• On its debut wave, the Living Experiment is surrounded by a hordes of Armored and Slows, which can be incredibly problematic.
  • Area of effect towers like the Pyromancer, Rocketeer, or Mortar can excel at clearing out the hordes, allowing DPS towers to focus on the Living Experiment itself.
    • Some of them like the Rocketeer and Mortar also have sufficient DPS to deal with the Living Experiment itself on their own.
• As the Living Experiment has Defense, you can use Defense bypassing towers like the Trapper or Military Base to deal with this.
  • As these towers also have AOE attacks, they can be also used to deal with the hordes of enemies it usually spawns with.
• Defense dropping towers, like the Pyromancer or Freezer can be used to reduce its defense, allowing your towers to deal more damage to it.
• While the Living Experiment does not have any immunities to crowd control by default, it is a large enemy, making certain forms of stalling like freeze or knockback less effective on it.

Sounds

Sound	Description
Death
	When the Living Experiment dies

Gallery

Animations

• 
  Current 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

• 
  Living Experiment on the game thumbnail.

Promotional Images

• 
  Living Experiment on a promotional image.

Promotional Videos

• 
  Living Experiment on a promotional video.
• 
  Living Experiment on a promotional video.
• 
  Living Experiment on a promotional video.
• 
  Living Experiment on a promotional video.
• 
  Living Experiment on a promotional video.
• 
  Living Experiment on a promotional video.
• 
  Living Experiment on a promotional video.

Trailers

• 
  Living Experiment in the game trailer.
• 
  Living Experiment in the game trailer.
• 
  Living Experiment in the game trailer.

Renders

• 
  Living Experiment on a render.

Miscellaneous

• 
  Living Experiment featured in the v1.20.0 update log.
• 
  Living Experiment on its Index icon.

Trivia

• Despite the Commander stating that the Living Experiment can heal enemies around it, it has no such ability.

Update History

• 3 May 2024 - v1.20.0
  • Living Experiment added.
  • Bug: Poison and electric defense dropping does not reduce Living Experiment's defense.
  • Bug: Living Experiments with the Slime attribute do not spawn the Slime upon death.
• 10 May 2024 - v1.21.0
  • Living Experiment is now immune to the fallout damage from the Nuke while it is a boss enemy.
• 18 May 2024 - v1.22.0
  • Living Experiment is now immune to knockback while it is a boss enemy.
• 28 August 2024 - v1.29.0
  • Bug: Can be slowed down by the DJ Booth while a boss.
• 31 August 2024 - v1.29.7
  • Bugfix: No longer can be slowed down by the DJ Booth while a boss.
• 6 November 2024 - v1.40.0
  • Living Experiment can no longer have its defense dropped while a Boss enemy.
  • Bugfix: Poison and electric defense dropping towers now can drop its defense, though the Jester still cannot drop it.
• 16 December 2024 - v1.46.0
  • Bug: Living Experiment's has no animations in its Index entry.
• 9 April 2025 - v1.60.0
  • Now appears in Mid Rank PVP Test, where it has 3,000 health.
• 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 all of its PVP Test statistics.
• 12 September 2025 - v1.74.3a
  • Now appears in Sk8 P4rk Pro difficulty as part of The Takeover Event.
    • Has 3,250 health in Sk8 P4rk.
  • Cash given is now mode dependent.
    • Majority of modes now give $625 every 25% health lost.
    • The Takeover Event Pro difficulty gives $750 every 25% health lost.
    • Default value is $1 every 25% health lost.
• 22 September 2025 - v1.74.3g
  • No longer appears in Sk8 P4rk, as it has been removed.
• 24 September 2025 - v1.75.0
  • Now appears in Challenge Trials.
    • Has 3,000 health in Challenge Trials.
    • Gives $300 every 25% health lost.
• 28 January 2026 - v1.84.0
  • First wave appearance changed from 16 to 18 in Intermediate mode.
  • Health increased from 1,800 to 2,400.
  • Cash given increased from $625 to $850 every 25% health lost.

Notes

Intermediate
Previous Debut	Current Debut	Next Debut
Boomer Wave 17	Hazmat & Living Experiment Wave 18	Speedy Boss Wave 20

Challenge Trials
Previous Debut	Current Debut	Next Debut
Bolt Wave 13	Living Experiment Wave 15	Elite Hazmat Wave 17

Molten Arena PVP
Previous Debut	Current Debut	Next Debut
Reaver & Necromancer Wave 14	Living Experiment Wave 16	Hazmat Wave 17

Pro (The Takeover)
Previous Debut	Current Debut	Next Debut
Reaver & Necromancer Wave 9	Living Experiment & Hazmat Wave 11	Failed Experiment Wave 13